/******************************************************************************
 * Product: Adempiere ERP & CRM Smart Business Solution                       *
 * Copyright (C) 1999-2006 ComPiere, Inc. All Rights Reserved.                *
 * This program is free software; you can redistribute it and/or modify it    *
 * under the terms version 2 of the GNU General Public License as published   *
 * by the Free Software Foundation. This program is distributed in the hope   *
 * that it will be useful, but WITHOUT ANY WARRANTY; without even the implied *
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.           *
 * See the GNU General Public License for more details.                       *
 * You should have received a copy of the GNU General Public License along    *
 * with this program; if not, write to the Free Software Foundation, Inc.,    *
 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.                     *
 * For the text or an alternative of this public license, you may reach us    *
 * ComPiere, Inc., 2620 Augustine Dr. #245, Santa Clara, CA 95054, USA        *
 * or via info@compiere.org or http://www.compiere.org/license.html           *
 * Contributor(s): Teo Sarca                                                  *
 *****************************************************************************/
package org.compiere.model;

import java.math.BigDecimal;
import java.math.RoundingMode;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Timestamp;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import java.util.Properties;
import java.util.logging.Level;

import org.adempiere.exceptions.AverageCostingNegativeQtyException;
import org.adempiere.exceptions.AverageCostingZeroQtyException;
import org.adempiere.exceptions.DBException;
import org.compiere.util.CLogger;
import org.compiere.util.DB;
import org.compiere.util.Env;
import org.compiere.util.Msg;
import org.compiere.util.Trx;
import org.compiere.util.Util;

/**
 * 	Product Cost Model
 *
 *  @author Jorg Janke
 *  @version $Id: MCost.java,v 1.6 2006/07/30 00:51:02 jjanke Exp $
 *
 *  @author Carlos Ruiz - globalqss
 *		<li>integrate bug fix from Teo Sarca - [ 1619112 ] Posible problem for LastPO costing, Batch/Lot level
 *
 *  @author Red1
 *  	<li>FR: [ 2214883 ] Remove SQL code and Replace for Query - red1 (only non-join query)
 *  
 *  @author Teo Sarca
 *  	<li>BF [ 2847648 ] Manufacture and shipment cost errors
 *  		https://sourceforge.net/p/adempiere/libero/237/
 */
public class MCost extends X_M_Cost implements ICostInfo
{
	/**
	 * generated serial id
	 */
	private static final long serialVersionUID = 7669971447038015333L;

	/**
	 * @param product
	 * @param M_AttributeSetInstance_ID
	 * @param trxName
	 * @return current product cost
	 */
	public static BigDecimal getCurrentCost(MProduct product, int M_AttributeSetInstance_ID, String trxName)
	{
		int AD_Org_ID = Env.getAD_Org_ID(Env.getCtx());
		MAcctSchema as = MClient.get(Env.getAD_Client_ID(Env.getCtx())).getAcctSchema();
		String costingMethod = product.getCostingMethod(as);
		return getCurrentCost(product, M_AttributeSetInstance_ID, as, AD_Org_ID, costingMethod, new BigDecimal("1"), 0, true, trxName); 
	}
	
	/**
	 * 	Retrieve/Calculate Current Cost Price
	 *	@param product product
	 *	@param M_AttributeSetInstance_ID asi for batchlot costing level
	 *	@param as accounting schema
	 *	@param AD_Org_ID org for organization costing level
	 *	@param costingMethod AcctSchema.COSTINGMETHOD_*
	 *	@param qty qty
	 *	@param C_OrderLine_ID optional order line
	 *	@param zeroCostsOK zero/no costs are OK
	 *	@param trxName trx
	 *	@return current cost price or null
	 */
	public static BigDecimal getCurrentCost (MProduct product,
		int M_AttributeSetInstance_ID,
		MAcctSchema as, int AD_Org_ID, String costingMethod,
		BigDecimal qty, int C_OrderLine_ID,
		boolean zeroCostsOK, String trxName)
	{
		return getCost(product, M_AttributeSetInstance_ID, as, AD_Org_ID, costingMethod, qty, C_OrderLine_ID, zeroCostsOK, null, null, false, trxName);
	}
	
	/**
	 * Retrieve/Calculate Cost Price
	 * @param product product
	 * @param M_AttributeSetInstance_ID asi for batchlot costing level
	 * @param as schema
	 * @param AD_Org_ID org for organization costing level
	 * @param costingMethod AcctSchema.COSTINGMETHOD_*
	 * @param qty qty
	 * @param C_OrderLine_ID optional order line
	 * @param zeroCostsOK zero/no costs are OK
	 * @param dateAcct account date
	 * @param costDetail optional cost detail - use to retrieve the cost history
	 * @param isInBackDatePostingProcess in a back-date posting process
	 * @param trxName trx
	 * @return cost price or null
	 */
	protected static BigDecimal getCost (MProduct product,
			int M_AttributeSetInstance_ID,
			MAcctSchema as, int AD_Org_ID, String costingMethod,
			BigDecimal qty, int C_OrderLine_ID,
			boolean zeroCostsOK, 
			Timestamp dateAcct, MCostDetail costDetail, boolean isInBackDatePostingProcess,
			String trxName)
	{
		String CostingLevel = product.getCostingLevel(as);
		if (MAcctSchema.COSTINGLEVEL_Client.equals(CostingLevel))
		{
			AD_Org_ID = 0;
			M_AttributeSetInstance_ID = 0;
		}
		else if (MAcctSchema.COSTINGLEVEL_Organization.equals(CostingLevel))
			M_AttributeSetInstance_ID = 0;
		else if (MAcctSchema.COSTINGLEVEL_BatchLot.equals(CostingLevel))
			AD_Org_ID = 0;
		//	Costing Method
		if (costingMethod == null)
		{
			costingMethod = product.getCostingMethod(as);
			if (costingMethod == null)
			{
				throw new IllegalArgumentException("No Costing Method");
			}
		}

		//	Create/Update Costs
		if (!isInBackDatePostingProcess) // skip if is in a back-date posting process
			MCostDetail.processProduct (as, product, dateAcct, trxName);
		 
		MCostHistory history = null;
		if (costDetail != null) // get the latest cost history record of the cost detail
			history = MCostHistory.get(product.getCtx(), AD_Org_ID, 
					as.getM_CostType_ID(), as.getC_AcctSchema_ID(), costingMethod, 0, M_AttributeSetInstance_ID, costDetail, trxName);
		if (history == null && dateAcct != null) {	// get cost history record based on the account date
			history = MCostHistory.get(product.getCtx(), product.getAD_Client_ID(), AD_Org_ID, product.getM_Product_ID(),
					as.getM_CostType_ID(), as.getC_AcctSchema_ID(), costingMethod, 0, M_AttributeSetInstance_ID, dateAcct, trxName);
		}

		return getCost (
			product, M_AttributeSetInstance_ID,
			as, AD_Org_ID, as.getM_CostType_ID(), costingMethod, qty,
			C_OrderLine_ID, zeroCostsOK, 
			history == null ? null : history.getNewCostPrice(), trxName);
	}	//	getCurrentCost

	/**
	 * 	Calculate and Get Current Cost Price for Costing Level
	 *	@param product product
	 *	@param M_ASI_ID M_AttributeSetInstance_ID for batchlot costing level
	 *	@param as AcctSchema
	 *	@param Org_ID AD_Org_ID for organization costing level
	 *	@param M_CostType_ID cost type
	 *	@param costingMethod method
	 *	@param qty quantity
	 *	@param C_OrderLine_ID optional order line
	 *	@param zeroCostsOK zero/no costs are OK
	 *	@param trxName trx
	 *	@return cost price or null
	 */
	protected static BigDecimal getCurrentCost (MProduct product, int M_ASI_ID,
		MAcctSchema as, int Org_ID, int M_CostType_ID,
		String costingMethod, BigDecimal qty, int C_OrderLine_ID,
		boolean zeroCostsOK, String trxName)
	{
		return getCost(product, M_ASI_ID, as, Org_ID, M_CostType_ID, costingMethod, qty, C_OrderLine_ID, zeroCostsOK, null, trxName);
	}
	
	/**
	 * Calculate and Get Cost Price for Costing Level
	 * @param product product
	 * @param M_ASI_ID M_AttributeSetInstance_ID for batchlot costing level
	 * @param as AcctSchema
	 * @param Org_ID AD_Org_ID for organization costing level
	 * @param M_CostType_ID cost type
	 * @param costingMethod method
	 * @param qty quantity
	 * @param C_OrderLine_ID optional order line
	 * @param zeroCostsOK zero/no costs are OK
	 * @param dateAcct account date
	 * @param historyCostPrice optional cost price from the cost history
	 * @param trxName trx
	 * @return cost price or null
	 */
	private static BigDecimal getCost (MProduct product, int M_ASI_ID,
			MAcctSchema as, int Org_ID, int M_CostType_ID,
			String costingMethod, BigDecimal qty, int C_OrderLine_ID,
			boolean zeroCostsOK, BigDecimal historyCostPrice, String trxName)
	{
		String costElementType = null;
		BigDecimal percent = null;
		//
		BigDecimal materialCostEach = Env.ZERO;
		BigDecimal otherCostEach = Env.ZERO;
		BigDecimal percentage = Env.ZERO;
		int count = 0;
		//
		String sql = "SELECT"
			+ " COALESCE(SUM(c.CurrentCostPrice),0),"		// 1
			+ " ce.CostElementType, ce.CostingMethod,"		// 2,3
			+ " c.Percent, c.M_CostElement_ID ,"			// 4,5
			+ " COALESCE(SUM(c.CurrentCostPriceLL),0) "		// 6
			+ " FROM M_Cost c"
			+ " LEFT OUTER JOIN M_CostElement ce ON (c.M_CostElement_ID=ce.M_CostElement_ID) "
			+ "WHERE c.AD_Client_ID=? AND c.AD_Org_ID=?"		//	#1/2
			+ " AND c.M_Product_ID=?"							//	#3
			+ " AND (c.M_AttributeSetInstance_ID=? OR c.M_AttributeSetInstance_ID=0)"	//	#4
			+ " AND c.M_CostType_ID=? AND c.C_AcctSchema_ID=?"	//	#5/6
			+ " AND (ce.CostingMethod IS NULL OR ce.CostingMethod=?) "	//	#7
			+ "GROUP BY ce.CostElementType, ce.CostingMethod, c.Percent, c.M_CostElement_ID";
		PreparedStatement pstmt = null;
		ResultSet rs = null;
		try
		{
			pstmt = DB.prepareStatement (sql, trxName);
			pstmt.setInt (1, product.getAD_Client_ID());
			pstmt.setInt (2, Org_ID);
			pstmt.setInt (3, product.getM_Product_ID());
			pstmt.setInt (4, M_ASI_ID);
			pstmt.setInt (5, M_CostType_ID);
			pstmt.setInt (6, as.getC_AcctSchema_ID());
			pstmt.setString (7, costingMethod);
			rs = pstmt.executeQuery ();
			while (rs.next ())
			{
				BigDecimal currentCostPrice = rs.getBigDecimal(1);
				BigDecimal currentCostPriceLL = rs.getBigDecimal(6);
				costElementType = rs.getString(2);
				String cm = rs.getString(3);
				percent = rs.getBigDecimal(4);
				if (s_log.isLoggable(Level.FINEST)) s_log.finest("CurrentCostPrice=" + currentCostPrice
					+ ", CurrentCostPriceLL=" + currentCostPriceLL
					+ ", CostElementType=" + costElementType
					+ ", CostingMethod=" + cm
					+ ", Percent=" + percent);				
				
				if (currentCostPrice != null && currentCostPrice.signum() != 0)
				{
					if (cm != null)
					{
						// use the cost price from the cost history record
						if (historyCostPrice != null && historyCostPrice.compareTo(currentCostPrice) != 0)
							currentCostPrice = historyCostPrice;
						materialCostEach = materialCostEach.add(currentCostPrice);
					}
					else
					{
						otherCostEach = otherCostEach.add(currentCostPrice);
					}
				}
				if (percent != null && percent.signum() != 0)
					percentage = percentage.add(percent);
				count++;
			}
		}
		catch (SQLException e)
		{
			throw new DBException(e, sql);
		}
		finally
		{
			DB.close(rs, pstmt);
			rs = null; pstmt = null;
		}

		if (count > 1)	//	Print summary
			if (s_log.isLoggable(Level.FINEST)) s_log.finest("MaterialCost=" + materialCostEach
				+ ", OtherCosts=" + otherCostEach
				+ ", Percentage=" + percentage);

		//	Seed Initial Costs
		if (materialCostEach.signum() == 0)		//	no costs
		{
			if (zeroCostsOK)
				return Env.ZERO;
		}

		//	Material Costs
		BigDecimal materialCost = materialCostEach.multiply(qty);
		//	Standard costs - just Material Costs
		if (MCostElement.COSTINGMETHOD_StandardCosting.equals(costingMethod))
		{
			if (s_log.isLoggable(Level.FINER)) s_log.finer("MaterialCosts = " + materialCost);
			return materialCost;
		}
		if (MCostElement.COSTINGMETHOD_Fifo.equals(costingMethod)
			|| MCostElement.COSTINGMETHOD_Lifo.equals(costingMethod))
		{
			MCostElement ce = MCostElement.getMaterialCostElement(as, costingMethod);
			materialCost = MCostQueue.getCosts(product, M_ASI_ID,
				as, Org_ID, ce, qty, trxName);
		}

		//	Other Costs
		BigDecimal otherCost = otherCostEach.multiply(qty);

		//	Costs
		BigDecimal costs = otherCost.add(materialCost);
		if (costs.signum() == 0)
			return null;

		if (s_log.isLoggable(Level.FINER)) s_log.finer("Sum Costs = " + costs);
		int precision = as.getCostingPrecision();
		if (percentage.signum() == 0)	//	no percentages
		{
			if (costs.scale() > precision)
				costs = costs.setScale(precision, RoundingMode.HALF_UP);
			return costs;
		}
		//
		BigDecimal percentCost = costs.multiply(percentage);
		percentCost = percentCost.divide(Env.ONEHUNDRED, precision, RoundingMode.HALF_UP);
		costs = costs.add(percentCost);
		if (costs.scale() > precision)
			costs = costs.setScale(precision, RoundingMode.HALF_UP);
		if (s_log.isLoggable(Level.FINER)) s_log.finer("Sum Costs = " + costs + " (Add=" + percentCost + ")");
		return costs;
	}	//	getCurrentCost

	/**
	 * 	Get Seed Costs
	 *	@param product product
	 *	@param M_ASI_ID costing M_AttributeSetInstance_ID for batchlot costing level
	 *	@param as accounting schema
	 *	@param Org_ID AD_Org_ID for organization costing level
	 *	@param costingMethod costing method
	 *	@param C_OrderLine_ID optional order line
	 *	@return seed cost or null
	 */
	public static BigDecimal getSeedCosts (MProduct product, int M_ASI_ID,
		MAcctSchema as, int Org_ID, String costingMethod, int C_OrderLine_ID)
	{
		BigDecimal retValue = null;
		//	Direct Data
		if (MCostElement.COSTINGMETHOD_AverageInvoice.equals(costingMethod))
			return null;
		else if (MCostElement.COSTINGMETHOD_AveragePO.equals(costingMethod))
			return null;
		else if (MCostElement.COSTINGMETHOD_Fifo.equals(costingMethod))
			return null;
		else if (MCostElement.COSTINGMETHOD_Lifo.equals(costingMethod))
			return null;
		else if (MCostElement.COSTINGMETHOD_LastInvoice.equals(costingMethod))
			retValue = getLastInvoicePrice(product, M_ASI_ID, Org_ID, as.getC_Currency_ID());
		else if (MCostElement.COSTINGMETHOD_LastPOPrice.equals(costingMethod))
		{
			if (C_OrderLine_ID != 0)
				retValue = getPOPrice(product, C_OrderLine_ID, as.getC_Currency_ID());
			if (retValue == null || retValue.signum() == 0)
				retValue = getLastPOPrice(product, M_ASI_ID, Org_ID, as.getC_Currency_ID());
		}
		else if (MCostElement.COSTINGMETHOD_StandardCosting.equals(costingMethod))
			;
		else if (MCostElement.COSTINGMETHOD_UserDefined.equals(costingMethod))
			;
		else
			throw new IllegalArgumentException("Unknown Costing Method = " + costingMethod);
		if (retValue != null && retValue.signum() > 0)
		{
			if (s_log.isLoggable(Level.FINE)) s_log.fine(product.getName() + ", CostingMethod=" + costingMethod + " - " + retValue);
			return retValue;
		}

		//	Look for exact Order Line
		if (C_OrderLine_ID != 0)
		{
			retValue = getPOPrice(product, C_OrderLine_ID, as.getC_Currency_ID());
			if (retValue != null && retValue.signum() > 0)
			{
				if (s_log.isLoggable(Level.FINE)) s_log.fine(product.getName() + ", PO - " + retValue);
				return retValue;
			}
		}

		//	Look for Standard Costs first
		if (!MCostElement.COSTINGMETHOD_StandardCosting.equals(costingMethod))
		{
			MCostElement ce = MCostElement.getMaterialCostElement(as, MCostElement.COSTINGMETHOD_StandardCosting);
			MCost cost = get(product, M_ASI_ID, as, Org_ID, ce.getM_CostElement_ID(), product.get_TrxName());
			if (cost != null && cost.getCurrentCostPrice().signum() > 0)
			{
				if (s_log.isLoggable(Level.FINE)) s_log.fine(product.getName() + ", Standard - " + cost);
				return cost.getCurrentCostPrice();
			}
		}

		//	We do not have a price
		//	PO first
		if (MCostElement.COSTINGMETHOD_LastPOPrice.equals(costingMethod)
			|| MCostElement.COSTINGMETHOD_StandardCosting.equals(costingMethod))
		{
			//	try Last PO
			retValue = getLastPOPrice(product, M_ASI_ID, Org_ID, as.getC_Currency_ID());
			if (Org_ID != 0 && (retValue == null || retValue.signum() == 0))
				retValue = getLastPOPrice(product, M_ASI_ID, 0, as.getC_Currency_ID());
			if (retValue != null && retValue.signum() > 0)
			{
				if (s_log.isLoggable(Level.FINE)) s_log.fine(product.getName() + ", LastPO = " + retValue);
				return retValue;
			}
		}
		else	//	Inv first
		{
			//	try last Inv
			retValue = getLastInvoicePrice(product, M_ASI_ID, Org_ID, as.getC_Currency_ID());
			if (Org_ID != 0 && (retValue == null || retValue.signum() == 0))
				retValue = getLastInvoicePrice(product, M_ASI_ID, 0, as.getC_Currency_ID());
			if (retValue != null && retValue.signum() != 0)
			{
				if (s_log.isLoggable(Level.FINE)) s_log.fine(product.getName() + ", LastInv = " + retValue);
				return retValue;
			}
		}

		//	Still Nothing
		//	Inv second
		if (MCostElement.COSTINGMETHOD_LastPOPrice.equals(costingMethod)
			|| MCostElement.COSTINGMETHOD_StandardCosting.equals(costingMethod))
		{
			//	try last Inv
			retValue = getLastInvoicePrice(product, M_ASI_ID, Org_ID, as.getC_Currency_ID());
			if (Org_ID != 0 && (retValue == null || retValue.signum() == 0))
				retValue = getLastInvoicePrice(product, M_ASI_ID, 0, as.getC_Currency_ID());
			if (retValue != null && retValue.signum() > 0)
			{
				if (s_log.isLoggable(Level.FINE)) s_log.fine(product.getName() + ", LastInv = " + retValue);
				return retValue;
			}
		}
		else	//	PO second
		{
			//	try Last PO
			retValue = getLastPOPrice(product, M_ASI_ID, Org_ID, as.getC_Currency_ID());
			if (Org_ID != 0 && (retValue == null || retValue.signum() == 0))
				retValue = getLastPOPrice(product, M_ASI_ID, 0, as.getC_Currency_ID());
			if (retValue != null && retValue.signum() > 0)
			{
				if (s_log.isLoggable(Level.FINE)) s_log.fine(product.getName() + ", LastPO = " + retValue);
				return retValue;
			}
		}

		//	Still nothing try ProductPO
		MProductPO[] pos = MProductPO.getOfProduct(product.getCtx(), product.getM_Product_ID(), product.get_TrxName());
		for (int i = 0; i < pos.length; i++)
		{
			BigDecimal price = pos[i].getPricePO();
			if (price == null || price.signum() == 0)
				price = pos[i].getPriceList();
			if (price != null && price.signum() != 0)
			{
				price = MConversionRate.convert(product.getCtx(), price,
					pos[i].getC_Currency_ID(), as.getC_Currency_ID(),
					as.getAD_Client_ID(), Org_ID);
				if (price != null && price.signum() != 0)
				{
					if (pos[i].getC_UOM_ID() != product.getC_UOM_ID())
					{
						price = MUOMConversion.convertProductTo (Env.getCtx(), product.getM_Product_ID(),
								pos[i].getC_UOM_ID(), price);
					}
				}
				if (price != null && price.signum() != 0)
				{
					retValue = price;
					if (s_log.isLoggable(Level.FINE)) s_log.fine(product.getName() + ", Product_PO = " + retValue);
					return retValue;
				}
			}
		}

		//	Still nothing try Purchase Price List
		BigDecimal price = getSeedCostFromPriceList(product, as, Org_ID);
		if (price != null && price.signum() > 0)
		{
			retValue = price;
		}

		if (s_log.isLoggable(Level.FINE)) s_log.fine(product.getName() + " = " + retValue);
		return retValue;
	}	//	getSeedCosts

	/**
	 * Get seed cost from purchase price list
	 * @param product
	 * @param as
	 * @param orgID
	 * @return seed cost or null
	 */
	protected static BigDecimal getSeedCostFromPriceList(MProduct product,
			MAcctSchema as, int orgID) {
		String sql = "SELECT pp.PriceList, pp.PriceStd FROM M_ProductPrice pp" +
				" INNER JOIN M_PriceList_Version plv ON (pp.M_PriceList_Version_ID = plv.M_PriceList_Version_ID AND plv.ValidFrom <= trunc(getDate()))" +
				" INNER JOIN M_PriceList pl ON (plv.M_PriceList_ID = pl.M_PriceList_ID AND pl.IsSOPriceList = 'N')" +
				" WHERE pp.AD_Client_ID = ? AND pp.AD_Org_ID IN (0, ?) AND pp.M_Product_ID = ? AND pp.PriceList > 0 AND pp.IsActive = 'Y' " +
				" ORDER BY pp.AD_Org_ID Desc, plv.ValidFrom Desc";
		PreparedStatement st = null;
		ResultSet rs = null;
		try {
			st = DB.prepareStatement(sql, product.get_TrxName());
			st.setInt(1, as.getAD_Client_ID());
			st.setInt(2, orgID);
			st.setInt(3, product.getM_Product_ID());
			rs = st.executeQuery();
			if (rs.next()) {
				BigDecimal priceList = rs.getBigDecimal(1);
				BigDecimal priceStd = rs.getBigDecimal(2);
				if (priceStd != null && priceStd.signum() > 0)
					return priceStd;
				else
					return priceList;
			}
		} catch (SQLException e) {
			throw new DBException(e, sql);
		} finally {
			DB.close(rs, st);
		}
		return BigDecimal.ZERO;
	}

	/**
	 * 	Get Last Vendor Invoice Price in currency
	 *	@param product product
	 *	@param M_ASI_ID attribute set instance
	 *	@param AD_Org_ID org
	 *	@param C_Currency_ID accounting currency
	 *	@return last invoice price in currency
	 */
	public static BigDecimal getLastInvoicePrice (MProduct product,
		int M_ASI_ID, int AD_Org_ID, int C_Currency_ID)
	{
		BigDecimal retValue = null;
		StringBuilder sql = new StringBuilder("SELECT currencyConvertInvoice(i.C_Invoice_ID, ?, il.PriceActual, i.DateAcct) ")
			.append("FROM C_InvoiceLine il ")
			.append(" INNER JOIN C_Invoice i ON (il.C_Invoice_ID=i.C_Invoice_ID) ")
			.append("WHERE il.M_Product_ID=?")
			.append(" AND i.IsSOTrx='N'");
		if (AD_Org_ID != 0)
			sql.append(" AND il.AD_Org_ID=?");
		else if (M_ASI_ID != 0)
			sql.append(" AND il.M_AttributeSetInstance_ID=?");
		sql.append(" ORDER BY i.DateInvoiced DESC, il.Line DESC");
		//
		PreparedStatement pstmt = null;
		ResultSet rs = null;
		try
		{
			pstmt = DB.prepareStatement (sql.toString(), product.get_TrxName());
			pstmt.setInt (1, C_Currency_ID);
			pstmt.setInt (2, product.getM_Product_ID());
			if (AD_Org_ID != 0)
				pstmt.setInt (3, AD_Org_ID);
			else if (M_ASI_ID != 0)
				pstmt.setInt(3, M_ASI_ID);
			rs = pstmt.executeQuery ();
			if (rs.next ())
				retValue = rs.getBigDecimal(1);
		}
		catch (Exception e)
		{
			s_log.log (Level.SEVERE, sql.toString(), e);
		}
		finally
		{
			DB.close(rs, pstmt);
			rs = null; pstmt = null;
		}

		if (retValue != null)
		{
			if (s_log.isLoggable(Level.FINER)) s_log.finer(product.getName() + " = " + retValue);
			return retValue;
		}
		return null;
	}	//	getLastInvoicePrice

	/**
	 * 	Get Last PO Price in currency
	 *	@param product product
	 *	@param M_ASI_ID attribute set instance
	 *	@param AD_Org_ID org
	 *	@param C_Currency_ID accounting currency
	 *	@return last PO price in currency or null
	 */
	public static BigDecimal getLastPOPrice (MProduct product,
		int M_ASI_ID, int AD_Org_ID, int C_Currency_ID)
	{
		BigDecimal retValue = null;
		StringBuilder sql = new StringBuilder("SELECT currencyConvert(ol.PriceCost, o.C_Currency_ID, ?, o.DateAcct, o.C_ConversionType_ID, ol.AD_Client_ID, ol.AD_Org_ID),")
			.append(" currencyConvert(ol.PriceActual, o.C_Currency_ID, ?, o.DateAcct, o.C_ConversionType_ID, ol.AD_Client_ID, ol.AD_Org_ID) ")
			.append("FROM C_OrderLine ol")
			.append(" INNER JOIN C_Order o ON (ol.C_Order_ID=o.C_Order_ID) ")
			.append("WHERE ol.M_Product_ID=?")
			.append(" AND o.IsSOTrx='N'");
		if (AD_Org_ID != 0)
			sql.append(" AND ol.AD_Org_ID=?");
		else if (M_ASI_ID != 0)
			sql.append(" AND ol.M_AttributeSetInstance_ID=?");
		sql.append(" ORDER BY o.DateOrdered DESC, ol.Line DESC");
		//
		PreparedStatement pstmt = null;
		ResultSet rs = null;
		try
		{
			pstmt = DB.prepareStatement (sql.toString(), product.get_TrxName());
			pstmt.setInt (1, C_Currency_ID);
			pstmt.setInt (2, C_Currency_ID);
			pstmt.setInt (3, product.getM_Product_ID());
			if (AD_Org_ID != 0)
				pstmt.setInt (4, AD_Org_ID);
			else if (M_ASI_ID != 0)
				pstmt.setInt(4, M_ASI_ID);
			rs = pstmt.executeQuery ();
			if (rs.next ())
			{
				retValue = rs.getBigDecimal(1);
				if (retValue == null || retValue.signum() == 0)
					retValue = rs.getBigDecimal(2);
			}
		}
		catch (SQLException e)
		{
			throw new DBException(e, sql.toString());
		}
		finally
		{
			DB.close(rs, pstmt);
			rs = null; pstmt = null;
		}

		if (retValue != null)
		{
			if (s_log.isLoggable(Level.FINER)) s_log.finer(product.getName() + " = " + retValue);
			return retValue;
		}
		return null;
	}	//	getLastPOPrice

	/**
	 * 	Get PO Price in currency
	 * 	@param product product
	 *	@param C_OrderLine_ID order line
	 *	@param C_Currency_ID accounting currency
	 *	@return PO price for order line in currency or null
	 */
	public static BigDecimal getPOPrice (MProduct product, int C_OrderLine_ID, int C_Currency_ID)
	{
		BigDecimal retValue = null;
		String sql = "SELECT currencyConvert(ol.PriceCost, o.C_Currency_ID, ?, o.DateAcct, o.C_ConversionType_ID, ol.AD_Client_ID, ol.AD_Org_ID),"
			+ " currencyConvert(ol.PriceActual, o.C_Currency_ID, ?, o.DateAcct, o.C_ConversionType_ID, ol.AD_Client_ID, ol.AD_Org_ID) "
			+ "FROM C_OrderLine ol"
			+ " INNER JOIN C_Order o ON (ol.C_Order_ID=o.C_Order_ID) "
			+ "WHERE ol.C_OrderLine_ID=?"
			+ " AND o.IsSOTrx='N'";
		//
		PreparedStatement pstmt = null;
		ResultSet rs = null;
		try
		{
			pstmt = DB.prepareStatement (sql, product.get_TrxName());
			pstmt.setInt (1, C_Currency_ID);
			pstmt.setInt (2, C_Currency_ID);
			pstmt.setInt (3, C_OrderLine_ID);
			rs = pstmt.executeQuery ();
			if (rs.next ())
			{
				retValue = rs.getBigDecimal(1);
				if (retValue == null || retValue.signum() == 0)
					retValue = rs.getBigDecimal(2);
			}
		}
		catch (Exception e)
		{
			s_log.log (Level.SEVERE, sql, e);
		}
		finally
		{
			DB.close(rs, pstmt);
			rs = null; pstmt = null;
		}

		if (retValue != null)
		{
			if (s_log.isLoggable(Level.FINER)) s_log.finer(product.getName() + " = " + retValue);
			return retValue;
		}
		return null;
	}	//	getPOPrice

	/**
	 * 	Calculate costing for client.
	 * 	Handles Transaction if not in a transaction.
	 *	@param client client
	 */
	public static void create (MClient client)
	{
		MAcctSchema[] ass = MAcctSchema.getClientAcctSchema(client.getCtx(), client.getAD_Client_ID());
		String trxName = client.get_TrxName();
		String trxNameUsed = trxName;
		Trx trx = null;
		if (trxName == null)
		{
			trxNameUsed = Trx.createTrxName("Cost");
			trx = Trx.get(trxNameUsed, true);
			trx.setDisplayName(MCost.class.getName()+"_create");
		}
		boolean success = true;
		//	For all Products
		String sql = "SELECT * FROM M_Product p "
			+ "WHERE AD_Client_ID=?"
			+ " AND EXISTS (SELECT * FROM M_CostDetail cd "
				+ "WHERE p.M_Product_ID=cd.M_Product_ID AND Processed='N')";
		PreparedStatement pstmt = null;
		ResultSet rs = null;
		try
		{
			pstmt = DB.prepareStatement (sql, trxNameUsed);
			pstmt.setInt (1, client.getAD_Client_ID());
			rs = pstmt.executeQuery ();
			while (rs.next ())
			{
				MProduct product = new MProduct (client.getCtx(), rs, trxNameUsed);
				for (int i = 0; i < ass.length; i++)
				{
					BigDecimal cost = getCurrentCost(product, 0, ass[i], 0,
						null, Env.ONE, 0, false, trxNameUsed);		//	create non-zero costs
					if (s_log.isLoggable(Level.INFO)) s_log.info(product.getName() + " = " + cost);
				}
			}
		}
		catch (Exception e)
		{
			s_log.log (Level.SEVERE, sql, e);
			success = false;
		}
		finally
		{
			DB.close(rs, pstmt);
			rs = null; pstmt = null;
		}
		//	Transaction
		if (trx != null)
		{
			if (success)
				trx.commit();
			else
				trx.rollback();
			trx.close();
		}
	}	//	create


	/**
	 * 	Create standard Costing records for Product
	 *	@param product product
	 */
	protected static void create (MProduct product)
	{
		s_log.config(product.getName());

		//	Cost Elements
		MCostElement[] ces = MCostElement.getCostingMethods(product);
		MCostElement ce = null;
		for (MCostElement element : ces) {
			if (X_M_CostElement.COSTINGMETHOD_StandardCosting.equals(element.getCostingMethod()))
			{
				ce = element;
				break;
			}
		}
		if (ce == null)
		{
			s_log.fine("No Standard Costing in System");
			return;
		}

		MAcctSchema[] mass = MAcctSchema.getClientAcctSchema(product.getCtx(),
			product.getAD_Client_ID(), product.get_TrxName());
		MOrg[] orgs = null;

		int M_ASI_ID = 0;		//	No Attribute
		for (MAcctSchema as : mass)
		{
			String cl = product.getCostingLevel(as);
			//	Create Std Costing
			if (MAcctSchema.COSTINGLEVEL_Client.equals(cl))
			{
				createCostingRecord(product, M_ASI_ID, as, 0,ce.getM_CostElement_ID() );
			}
			else if (MAcctSchema.COSTINGLEVEL_Organization.equals(cl))
			{
				if (as.getAD_OrgOnly_ID() > 0 && MOrg.get(product.getCtx(), as.getAD_OrgOnly_ID()).isSummary())
				{
					MClient client = MClient.get(product.getCtx(), product.getAD_Client_ID());
					MClientInfo ci = client.getInfo();
					MTree vTree = new MTree (product.getCtx(), ci.getAD_Tree_Org_ID(), false, true, true, product.get_TrxName());

					MTreeNode root = vTree.getRoot();
					createForChildOrg(root, product, as, M_ASI_ID, ce, false);
				}
				else
				{
					if (orgs == null)
						orgs = MOrg.getOfClient(product);
					
					for (MOrg o : orgs)
					{
						if (o.isSummary())
							continue;
						if (as.getAD_OrgOnly_ID() == o.getAD_Org_ID() || as.getAD_OrgOnly_ID() == 0) 
						{
							createCostingRecord(product, M_ASI_ID, as, o.getAD_Org_ID(), ce.getM_CostElement_ID() );

						} 
					}
				}

			} 
			else
			{
				s_log.warning("Not created: Std.Cost for " + product.getName()
						+ " - Costing Level on Batch/Lot");
			}//	accounting schema loop
		}
	}	//	create

	/**
	 * Organization costing level - create costing records for child organization
	 * @param root
	 * @param product
	 * @param as
	 * @param M_ASI_ID
	 * @param ce
	 * @param found
	 */
	private static void createForChildOrg(MTreeNode root, MProduct product, MAcctSchema as, int M_ASI_ID, MCostElement ce, boolean found) 
	{
		int parentId = root.getNode_ID();
		if (!found)
			found = (parentId == as.getAD_OrgOnly_ID());
		Enumeration<?> nodeEnum = root.children();
		MTreeNode child = null;
		while(nodeEnum.hasMoreElements()) 
		{
			child = (MTreeNode)nodeEnum.nextElement();
			if (child != null && child.getChildCount() > 0) 
			{
				createForChildOrg(child, product, as, M_ASI_ID, ce, found);
			} 
			else if (found) 
			{
				int orgId = child.getNode_ID();
				MOrg org = MOrg.get(product.getCtx(), orgId);
				if (!org.isSummary())
					createCostingRecord(product, M_ASI_ID, as, orgId, ce.getM_CostElement_ID());
			}
		}
	}

	/**
	 * Create costing record (MCost).
	 * @param product
	 * @param M_ASI_ID
	 * @param as
	 * @param AD_Org_ID
	 * @param M_CostElement_ID
	 */
	private static void createCostingRecord(MProduct product,int M_ASI_ID, MAcctSchema as, int AD_Org_ID, int M_CostElement_ID) {
		MCost cost = MCost.get (product, M_ASI_ID,
				as, AD_Org_ID, M_CostElement_ID, product.get_TrxName());
		if (cost.is_new())
		{
			if (cost.save()) {
				if (s_log.isLoggable(Level.CONFIG)) s_log.config("Std.Cost for " + product.getName()
					+ " - " + as.getName());
			} else {
				s_log.warning("Not created: Std.Cost for " + product.getName()
						+ " - " + as.getName());
			}
		}
	}

	/**
	 * 	Delete costing records for Product (for client and organization costing level)
	 *	@param product product
	 **/
	protected static void delete (MProduct product)
	{
	 	if (s_log.isLoggable(Level.CONFIG)) s_log.config(product.getName());
		//	Cost Elements
		List <MCostElement> ces = MCostElement.getCostElementsWithCostingMethods(product);

		MAcctSchema[] mass = MAcctSchema.getClientAcctSchema(product.getCtx(),
			product.getAD_Client_ID(), product.get_TrxName());
		MOrg[] orgs = null;

		int M_ASI_ID = 0;		//	No Attribute
		for (MAcctSchema as : mass)
		{
			String cl = product.getCostingLevel(as);
			//	Create Std Costing
			if (MAcctSchema.COSTINGLEVEL_Client.equals(cl))
			{
				for(MCostElement ce : ces)
				{
					MCost cost = MCost.get (product, M_ASI_ID,
						as, 0, ce.getM_CostElement_ID(), product.get_TrxName());
					if(cost != null)
						cost.deleteEx(true);
				}
			}
			else if (MAcctSchema.COSTINGLEVEL_Organization.equals(cl))
			{
				if (orgs == null)
					orgs = MOrg.getOfClient(product);
				for (MOrg o : orgs)
				{
					for(MCostElement ce : ces)
					{
						MCost cost = MCost.get (product, M_ASI_ID,
							as, o.getAD_Org_ID(), ce.getM_CostElement_ID(), product.get_TrxName());
						if(cost != null)
							cost.deleteEx(true);
					}
				}	//	for all orgs
			}
			else
			{
				s_log.warning("Not created: Cost for " + product.getName()
					+ " - Costing Level on Batch/Lot");
			}
		}	//	accounting schema loop
	}	//	create

	/**
	 * 	Calculate Average Invoice Cost from M_Transaction
	 *	@param product product
	 *	@param M_AttributeSetInstance_ID optional asi
	 *	@param as acct schema
	 *	@param AD_Org_ID optional org
	 *	@return average invoice costs or null
	 */
	public static BigDecimal calculateAverageInv (MProduct product, int M_AttributeSetInstance_ID,
		MAcctSchema as, int AD_Org_ID)
	{
		StringBuilder sql = new StringBuilder("SELECT t.MovementQty, mi.Qty, il.QtyInvoiced, il.PriceActual,")
			.append(" i.C_Currency_ID, i.DateAcct, i.C_ConversionType_ID, i.AD_Client_ID, i.AD_Org_ID, t.M_Transaction_ID ")
			.append("FROM M_Transaction t")
			.append(" INNER JOIN M_MatchInv mi ON (t.M_InOutLine_ID=mi.M_InOutLine_ID)")
			.append(" INNER JOIN C_InvoiceLine il ON (mi.C_InvoiceLine_ID=il.C_InvoiceLine_ID)")
			.append(" INNER JOIN C_Invoice i ON (il.C_Invoice_ID=i.C_Invoice_ID) ")
			.append("WHERE t.M_Product_ID=?");
		if (AD_Org_ID != 0)
			sql.append(" AND t.AD_Org_ID=?");
		else if (M_AttributeSetInstance_ID != 0)
			sql.append(" AND t.M_AttributeSetInstance_ID=?");
		sql.append(" ORDER BY t.M_Transaction_ID");

		PreparedStatement pstmt = null;
		ResultSet rs = null;
		BigDecimal newStockQty = Env.ZERO;
		//
		BigDecimal newAverageAmt = Env.ZERO;
		int oldTransaction_ID = 0;
		try
		{
			pstmt = DB.prepareStatement (sql.toString(), null);
			pstmt.setInt (1, product.getM_Product_ID());
			if (AD_Org_ID != 0)
				pstmt.setInt (2, AD_Org_ID);
			else if (M_AttributeSetInstance_ID != 0)
				pstmt.setInt (2, M_AttributeSetInstance_ID);
			rs = pstmt.executeQuery ();
			while (rs.next ())
			{
				BigDecimal oldStockQty = newStockQty;
				BigDecimal movementQty = rs.getBigDecimal(1);
				int M_Transaction_ID = rs.getInt(10);
				if (M_Transaction_ID != oldTransaction_ID)
					newStockQty = oldStockQty.add(movementQty);
				M_Transaction_ID = oldTransaction_ID;
				//
				BigDecimal matchQty = rs.getBigDecimal(2);
				if (matchQty == null)
				{
					if (s_log.isLoggable(Level.FINER)) s_log.finer("Movement=" + movementQty + ", StockQty=" + newStockQty);
					continue;
				}
				//	Assumption: everything is matched
				BigDecimal price = rs.getBigDecimal(4);
				int C_Currency_ID = rs.getInt(5);
				Timestamp DateAcct = rs.getTimestamp(6);
				int C_ConversionType_ID = rs.getInt(7);
				int Client_ID = rs.getInt(8);
				int Org_ID = rs.getInt(9);
				BigDecimal cost = MConversionRate.convert(product.getCtx(), price,
					C_Currency_ID, as.getC_Currency_ID(),
					DateAcct, C_ConversionType_ID, Client_ID, Org_ID);
				//
				BigDecimal oldAverageAmt = newAverageAmt;
				BigDecimal averageCurrent = oldStockQty.multiply(oldAverageAmt);
				BigDecimal averageIncrease = matchQty.multiply(cost);
				BigDecimal newAmt = averageCurrent.add(averageIncrease);
				newAmt = newAmt.setScale(as.getCostingPrecision(), RoundingMode.HALF_UP);
				newAverageAmt = newAmt.divide(newStockQty, as.getCostingPrecision(), RoundingMode.HALF_UP);
				if (s_log.isLoggable(Level.FINER)) s_log.finer("Movement=" + movementQty + ", StockQty=" + newStockQty
					+ ", Match=" + matchQty + ", Cost=" + cost + ", NewAvg=" + newAverageAmt);
			}
		}
		catch (SQLException e)
		{
			throw new DBException(e, sql.toString());
		}
		finally
		{
			DB.close(rs, pstmt);
			rs = null; pstmt = null;
		}
		//
		if (newAverageAmt != null && newAverageAmt.signum() != 0)
		{
			if (s_log.isLoggable(Level.FINER)) s_log.finer(product.getName() + " = " + newAverageAmt);
			return newAverageAmt;
		}
		return null;
	}	//	calculateAverageInv

	/**
	 * 	Calculate Average PO from M_Transaction
	 *	@param product product
	 *	@param M_AttributeSetInstance_ID asi
	 *	@param as acct schema
	 *	@param AD_Org_ID org
	 *	@return average PO cost or null
	 */
	public static BigDecimal calculateAveragePO (MProduct product, int M_AttributeSetInstance_ID,
		MAcctSchema as, int AD_Org_ID)
	{
		StringBuilder sql = new StringBuilder("SELECT t.MovementQty, mp.Qty, ol.QtyOrdered, ol.PriceCost, ol.PriceActual,")	//	1..5
			.append(" o.C_Currency_ID, o.DateAcct, o.C_ConversionType_ID,")	//	6..8
			.append(" o.AD_Client_ID, o.AD_Org_ID, t.M_Transaction_ID ")		//	9..11
			.append("FROM M_Transaction t")
			.append(" INNER JOIN M_MatchPO mp ON (t.M_InOutLine_ID=mp.M_InOutLine_ID)")
			.append(" INNER JOIN C_OrderLine ol ON (mp.C_OrderLine_ID=ol.C_OrderLine_ID)")
			.append(" INNER JOIN C_Order o ON (ol.C_Order_ID=o.C_Order_ID) ")
			.append("WHERE t.M_Product_ID=?");
		if (AD_Org_ID != 0)
			sql.append(" AND t.AD_Org_ID=?");
		else if (M_AttributeSetInstance_ID != 0)
			sql.append(" AND t.M_AttributeSetInstance_ID=?");
		sql.append(" ORDER BY t.M_Transaction_ID");

		PreparedStatement pstmt = null;
		ResultSet rs = null;
		BigDecimal newStockQty = Env.ZERO;
		//
		BigDecimal newAverageAmt = Env.ZERO;
		int oldTransaction_ID = 0;
		try
		{
			pstmt = DB.prepareStatement (sql.toString(), null);
			pstmt.setInt (1, product.getM_Product_ID());
			if (AD_Org_ID != 0)
				pstmt.setInt (2, AD_Org_ID);
			else if (M_AttributeSetInstance_ID != 0)
				pstmt.setInt (2, M_AttributeSetInstance_ID);
			rs = pstmt.executeQuery ();
			while (rs.next ())
			{
				BigDecimal oldStockQty = newStockQty;
				BigDecimal movementQty = rs.getBigDecimal(1);
				int M_Transaction_ID = rs.getInt(11);
				if (M_Transaction_ID != oldTransaction_ID)
					newStockQty = oldStockQty.add(movementQty);
				M_Transaction_ID = oldTransaction_ID;
				//
				BigDecimal matchQty = rs.getBigDecimal(2);
				if (matchQty == null)
				{
					if (s_log.isLoggable(Level.FINER)) s_log.finer("Movement=" + movementQty + ", StockQty=" + newStockQty);
					continue;
				}
				//	Assumption: everything is matched
				BigDecimal price = rs.getBigDecimal(4);
				if (price == null || price.signum() == 0)	//	PO Cost
					price = rs.getBigDecimal(5);			//	Actual
				int C_Currency_ID = rs.getInt(6);
				Timestamp DateAcct = rs.getTimestamp(7);
				int C_ConversionType_ID = rs.getInt(8);
				int Client_ID = rs.getInt(9);
				int Org_ID = rs.getInt(10);
				BigDecimal cost = MConversionRate.convert(product.getCtx(), price,
					C_Currency_ID, as.getC_Currency_ID(),
					DateAcct, C_ConversionType_ID, Client_ID, Org_ID);
				//
				BigDecimal oldAverageAmt = newAverageAmt;
				BigDecimal averageCurrent = oldStockQty.multiply(oldAverageAmt);
				BigDecimal averageIncrease = matchQty.multiply(cost);
				BigDecimal newAmt = averageCurrent.add(averageIncrease);
				newAmt = newAmt.setScale(as.getCostingPrecision(), RoundingMode.HALF_UP);
				newAverageAmt = newAmt.divide(newStockQty, as.getCostingPrecision(), RoundingMode.HALF_UP);
				if (s_log.isLoggable(Level.FINER)) s_log.finer("Movement=" + movementQty + ", StockQty=" + newStockQty
					+ ", Match=" + matchQty + ", Cost=" + cost + ", NewAvg=" + newAverageAmt);
			}
		}
		catch (SQLException e)
		{
			throw new DBException(e, sql.toString());
		}
		finally
		{
			DB.close(rs, pstmt);
			rs = null; pstmt = null;
		}
		//
		if (newAverageAmt != null && newAverageAmt.signum() != 0)
		{
			if (s_log.isLoggable(Level.FINER)) s_log.finer(product.getName() + " = " + newAverageAmt);
			return newAverageAmt;
		}
		return null;
	}	//	calculateAveragePO

	/**
	 * 	Calculate FiFo Cost from M_Transaction
	 *	@param product product
	 *	@param M_AttributeSetInstance_ID asi
	 *	@param as acct schema
	 *	@param AD_Org_ID org
	 *	@return FIFO costs or null
	 */
	public static BigDecimal calculateFiFo (MProduct product, int M_AttributeSetInstance_ID,
		MAcctSchema as, int AD_Org_ID)
	{
		StringBuilder sql = new StringBuilder("SELECT t.MovementQty, mi.Qty, il.QtyInvoiced, il.PriceActual,")
			.append(" i.C_Currency_ID, i.DateAcct, i.C_ConversionType_ID, i.AD_Client_ID, i.AD_Org_ID, t.M_Transaction_ID ")
			.append("FROM M_Transaction t")
			.append(" INNER JOIN M_MatchInv mi ON (t.M_InOutLine_ID=mi.M_InOutLine_ID)")
			.append(" INNER JOIN C_InvoiceLine il ON (mi.C_InvoiceLine_ID=il.C_InvoiceLine_ID)")
			.append(" INNER JOIN C_Invoice i ON (il.C_Invoice_ID=i.C_Invoice_ID) ")
			.append("WHERE t.M_Product_ID=?");
		if (AD_Org_ID != 0)
			sql.append(" AND t.AD_Org_ID=?");
		else if (M_AttributeSetInstance_ID != 0)
			sql.append(" AND t.M_AttributeSetInstance_ID=?");
		sql.append(" ORDER BY t.M_Transaction_ID");

		PreparedStatement pstmt = null;
		ResultSet rs = null;
		//
		int oldTransaction_ID = 0;
		ArrayList<QtyCost> fifo = new ArrayList<QtyCost>();
		try
		{
			pstmt = DB.prepareStatement (sql.toString(), null);
			pstmt.setInt (1, product.getM_Product_ID());
			if (AD_Org_ID != 0)
				pstmt.setInt (2, AD_Org_ID);
			else if (M_AttributeSetInstance_ID != 0)
				pstmt.setInt (2, M_AttributeSetInstance_ID);
			rs = pstmt.executeQuery ();
			while (rs.next ())
			{
				BigDecimal movementQty = rs.getBigDecimal(1);
				int M_Transaction_ID = rs.getInt(10);
				if (M_Transaction_ID == oldTransaction_ID)
					continue;	//	assuming same price for receipt
				M_Transaction_ID = oldTransaction_ID;
				//
				BigDecimal matchQty = rs.getBigDecimal(2);
				if (matchQty == null)	//	out (negative)
				{
					if (fifo.size() > 0)
					{
						QtyCost pp = (QtyCost)fifo.get(0);
						pp.Qty = pp.Qty.add(movementQty);
						BigDecimal remainder = pp.Qty;
						if (remainder.signum() == 0)
							fifo.remove(0);
						else
						{
							while (remainder.signum() != 0)
							{
								if (fifo.size() == 1)	//	Last
								{
									pp.Cost = Env.ZERO;
									remainder = Env.ZERO;
								}
								else
								{
									fifo.remove(0);
									pp = (QtyCost)fifo.get(0);
									pp.Qty = pp.Qty.add(movementQty);
									remainder = pp.Qty;
								}
							}
						}
					}
					else
					{
						QtyCost pp = new QtyCost (movementQty, Env.ZERO);
						fifo.add(pp);
					}
					if (s_log.isLoggable(Level.FINER)) s_log.finer("Movement=" + movementQty + ", Size=" + fifo.size());
					continue;
				}
				//	Assumption: everything is matched
				BigDecimal price = rs.getBigDecimal(4);
				int C_Currency_ID = rs.getInt(5);
				Timestamp DateAcct = rs.getTimestamp(6);
				int C_ConversionType_ID = rs.getInt(7);
				int Client_ID = rs.getInt(8);
				int Org_ID = rs.getInt(9);
				BigDecimal cost = MConversionRate.convert(product.getCtx(), price,
					C_Currency_ID, as.getC_Currency_ID(),
					DateAcct, C_ConversionType_ID, Client_ID, Org_ID);

				//	Add Stock
				boolean used = false;
				if (fifo.size() == 1)
				{
					QtyCost pp = (QtyCost)fifo.get(0);
					if (pp.Qty.signum() < 0)
					{
						pp.Qty = pp.Qty.add(movementQty);
						if (pp.Qty.signum() == 0)
							fifo.remove(0);
						else
							pp.Cost = cost;
						used = true;
					}

				}
				if (!used)
				{
					QtyCost pp = new QtyCost (movementQty, cost);
					fifo.add(pp);
				}
				if (s_log.isLoggable(Level.FINER)) s_log.finer("Movement=" + movementQty + ", Size=" + fifo.size());
			}
		}
		catch (SQLException e)
		{
			throw new DBException(e, sql.toString());
		}
		finally
		{
			DB.close(rs, pstmt);
			rs = null; pstmt = null;
		}

		if (fifo.size() == 0)
		{
			return null;
		}
		QtyCost pp = (QtyCost)fifo.get(0);
		if (s_log.isLoggable(Level.FINER)) s_log.finer(product.getName() + " = " + pp.Cost);
		return pp.Cost;
	}	//	calculateFiFo

	/**
	 * 	Calculate LiFo costs from M_Transaction
	 *	@param product product
	 *	@param M_AttributeSetInstance_ID asi
	 *	@param as acct schema
	 *	@param AD_Org_ID org
	 *	@return LIFO costs or null
	 */
	public static BigDecimal calculateLiFo (MProduct product, int M_AttributeSetInstance_ID,
		MAcctSchema as, int AD_Org_ID)
	{
		StringBuilder sql = new StringBuilder("SELECT t.MovementQty, mi.Qty, il.QtyInvoiced, il.PriceActual,")
			.append(" i.C_Currency_ID, i.DateAcct, i.C_ConversionType_ID, i.AD_Client_ID, i.AD_Org_ID, t.M_Transaction_ID ")
			.append("FROM M_Transaction t")
			.append(" INNER JOIN M_MatchInv mi ON (t.M_InOutLine_ID=mi.M_InOutLine_ID)")
			.append(" INNER JOIN C_InvoiceLine il ON (mi.C_InvoiceLine_ID=il.C_InvoiceLine_ID)")
			.append(" INNER JOIN C_Invoice i ON (il.C_Invoice_ID=i.C_Invoice_ID) ")
			.append("WHERE t.M_Product_ID=?");
		if (AD_Org_ID != 0)
			sql.append(" AND t.AD_Org_ID=?");
		else if (M_AttributeSetInstance_ID != 0)
			sql.append(" AND t.M_AttributeSetInstance_ID=?");
		//	Starting point?
		sql.append(" ORDER BY t.M_Transaction_ID DESC");

		PreparedStatement pstmt = null;
		ResultSet rs = null;
		//
		int oldTransaction_ID = 0;
		ArrayList<QtyCost> lifo = new ArrayList<QtyCost>();
		try
		{
			pstmt = DB.prepareStatement (sql.toString(), null);
			pstmt.setInt (1, product.getM_Product_ID());
			if (AD_Org_ID != 0)
				pstmt.setInt (2, AD_Org_ID);
			else if (M_AttributeSetInstance_ID != 0)
				pstmt.setInt (2, M_AttributeSetInstance_ID);
			rs = pstmt.executeQuery ();
			while (rs.next ())
			{
				BigDecimal movementQty = rs.getBigDecimal(1);
				int M_Transaction_ID = rs.getInt(10);
				if (M_Transaction_ID == oldTransaction_ID)
					continue;	//	assuming same price for receipt
				M_Transaction_ID = oldTransaction_ID;
				//
				BigDecimal matchQty = rs.getBigDecimal(2);
				if (matchQty == null)	//	out (negative)
				{
					if (lifo.size() > 0)
					{
						QtyCost pp = (QtyCost)lifo.get(lifo.size()-1);
						pp.Qty = pp.Qty.add(movementQty);
						BigDecimal remainder = pp.Qty;
						if (remainder.signum() == 0)
							lifo.remove(lifo.size()-1);
						else
						{
							while (remainder.signum() != 0)
							{
								if (lifo.size() == 1)	//	Last
								{
									pp.Cost = Env.ZERO;
									remainder = Env.ZERO;
								}
								else
								{
									lifo.remove(lifo.size()-1);
									pp = (QtyCost)lifo.get(lifo.size()-1);
									pp.Qty = pp.Qty.add(movementQty);
									remainder = pp.Qty;
								}
							}
						}
					}
					else
					{
						QtyCost pp = new QtyCost (movementQty, Env.ZERO);
						lifo.add(pp);
					}
					if (s_log.isLoggable(Level.FINER)) s_log.finer("Movement=" + movementQty + ", Size=" + lifo.size());
					continue;
				}
				//	Assumption: everything is matched
				BigDecimal price = rs.getBigDecimal(4);
				int C_Currency_ID = rs.getInt(5);
				Timestamp DateAcct = rs.getTimestamp(6);
				int C_ConversionType_ID = rs.getInt(7);
				int Client_ID = rs.getInt(8);
				int Org_ID = rs.getInt(9);
				BigDecimal cost = MConversionRate.convert(product.getCtx(), price,
					C_Currency_ID, as.getC_Currency_ID(),
					DateAcct, C_ConversionType_ID, Client_ID, Org_ID);
				//
				QtyCost pp = new QtyCost (movementQty, cost);
				lifo.add(pp);
				if (s_log.isLoggable(Level.FINER)) s_log.finer("Movement=" + movementQty + ", Size=" + lifo.size());
			}
		}
		catch (SQLException e)
		{
			throw new DBException(e, sql.toString());
		}
		finally
		{
			DB.close(rs, pstmt);
			rs = null; pstmt = null;
		}

		if (lifo.size() == 0)
		{
			return null;
		}
		QtyCost pp = (QtyCost)lifo.get(lifo.size()-1);
		if (s_log.isLoggable(Level.FINER)) s_log.finer(product.getName() + " = " + pp.Cost);
		return pp.Cost;
	}	//	calculateLiFo

	/**
	 *	MCost Qty-Cost Pair
	 */
	public static class QtyCost
	{
		/**
		 * 	Constructor
		 *	@param qty qty
		 *	@param cost cost
		 */
		public QtyCost (BigDecimal qty, BigDecimal cost)
		{
			Qty = qty;
			Cost = cost;
		}
		/** Qty		*/
		public BigDecimal	Qty = null;
		/** Cost	*/
		public BigDecimal	Cost = null;

		/**
		 * 	String Representation
		 *	@return info
		 */
		public String toString ()
		{
			StringBuilder sb = new StringBuilder ("Qty=").append(Qty)
				.append (",Cost=").append (Cost);
			return sb.toString ();
		}	//	toString
	}	//	QtyCost


	/**
	 * 	Get/Create Cost Record.
	 * 	CostingLevel is not validated.
	 *	@param product product
	 *	@param M_AttributeSetInstance_ID costing level asi
	 *	@param as accounting schema
	 *	@param AD_Org_ID costing level org
	 *	@param M_CostElement_ID element
	 *	@param trxName transaction name
	 *	@return cost price or null
	 */
	public static MCost get (MProduct product, int M_AttributeSetInstance_ID,
		MAcctSchema as, int AD_Org_ID, int M_CostElement_ID, String trxName)
	{
		MCost cost = get (product.getCtx(), product.getAD_Client_ID(), AD_Org_ID, product.getM_Product_ID(), 
				as.getM_CostType_ID(), as.getC_AcctSchema_ID(), M_CostElement_ID, M_AttributeSetInstance_ID, trxName);
		//	New
		if (cost == null)
		{
			cost = new MCost (product, M_AttributeSetInstance_ID,
				as, AD_Org_ID, M_CostElement_ID);
			cost.set_TrxName(trxName);
		}
		return cost;	
	}
	
	/**
	 * Get/Create Costing Record from MCostHistory/MCost
	 * CostingLevel is not validated.
	 * @param product product
	 * @param M_AttributeSetInstance_ID costing level asi
	 * @param as accounting schema
	 * @param AD_Org_ID costing level org
	 * @param M_CostElement_ID element
	 * @param dateAcct account date
	 * @param costDetail optional cost detail - use to retrieve the cost history
	 * @param trxName transaction name
	 * @return ICostInfo or null
	 */
	public static ICostInfo getCostInfo (MProduct product, int M_AttributeSetInstance_ID,
		MAcctSchema as, int AD_Org_ID, int M_CostElement_ID, Timestamp dateAcct, MCostDetail costDetail, String trxName)
	{
		ICostInfo costInfo = getCostInfo (product.getCtx(), product.getAD_Client_ID(), AD_Org_ID, product.getM_Product_ID(), 
				as.getM_CostType_ID(), as.getC_AcctSchema_ID(), M_CostElement_ID, M_AttributeSetInstance_ID, dateAcct, costDetail, trxName);
		//	New
		if (costInfo == null)
		{
			MCost cost = new MCost (product, M_AttributeSetInstance_ID,
				as, AD_Org_ID, M_CostElement_ID);
			cost.set_TrxName(trxName);
			return cost;
		}
		return costInfo;
	}	//	get

	@Deprecated
	public static MCost get (MProduct product, int M_AttributeSetInstance_ID,
			MAcctSchema as, int AD_Org_ID, int M_CostElement_ID)
	{
		return get(product, M_AttributeSetInstance_ID, as, AD_Org_ID, M_CostElement_ID, product.get_TrxName());
	}

	/**
	 * Get Cost Record
	 * @param ctx context
	 * @param AD_Client_ID client
	 * @param AD_Org_ID org
	 * @param M_Product_ID product
	 * @param M_CostType_ID cost type
	 * @param C_AcctSchema_ID as
	 * @param M_CostElement_ID cost element
	 * @param M_AttributeSetInstance_ID asi
	 * @param trxName transaction name
	 * @return MCost or null
	 */
	public static MCost get (Properties ctx, int AD_Client_ID, int AD_Org_ID, int M_Product_ID,
		int M_CostType_ID, int C_AcctSchema_ID, int M_CostElement_ID,
		int M_AttributeSetInstance_ID,
		String trxName)
	{
		final String whereClause = "AD_Client_ID=? AND AD_Org_ID=?"
				+" AND "+COLUMNNAME_M_Product_ID+"=?"
				+" AND "+COLUMNNAME_M_CostType_ID+"=?"
				+" AND "+COLUMNNAME_C_AcctSchema_ID+"=?"
				+" AND "+COLUMNNAME_M_CostElement_ID+"=?"
				+" AND "+COLUMNNAME_M_AttributeSetInstance_ID+"=?";
		final Object[] params = new Object[]{AD_Client_ID, AD_Org_ID, M_Product_ID,
							M_CostType_ID, C_AcctSchema_ID,
							M_CostElement_ID, M_AttributeSetInstance_ID};
		return new Query(ctx, Table_Name, whereClause, trxName)
				.setOnlyActiveRecords(true)
				.setParameters(params)
				.firstOnly();
	}
	
	/**
	 * Get Costing Record from MCostHistory/MCost
	 * @param ctx context
	 * @param AD_Client_ID client
	 * @param AD_Org_ID org
	 * @param M_Product_ID product
	 * @param M_CostType_ID cost type
	 * @param C_AcctSchema_ID as
	 * @param M_CostElement_ID cost element
	 * @param M_AttributeSetInstance_ID asi
	 * @param dateAcct account date
	 * @param costDetail optional cost detail - use to retrieve the cost history
	 * @param trxName transaction name
	 * @return ICostInfo or null
	 */
	public static ICostInfo getCostInfo (Properties ctx, int AD_Client_ID, int AD_Org_ID, int M_Product_ID,
			int M_CostType_ID, int C_AcctSchema_ID, int M_CostElement_ID,
			int M_AttributeSetInstance_ID,  
			Timestamp dateAcct, MCostDetail costDetail,
			String trxName)
	{
		MCostElement ce = MCostElement.get(M_CostElement_ID);
		String costingMethod = ce.getCostingMethod();
		MCostHistory history = null;
		if (costDetail != null) // get the latest cost history record of the cost detail
 			history = MCostHistory.get(ctx, AD_Org_ID, 
					M_CostType_ID, C_AcctSchema_ID, costingMethod, M_CostElement_ID, M_AttributeSetInstance_ID, costDetail, trxName);
		if (history == null && dateAcct != null) {	// get cost history record based on the account date
			history = MCostHistory.get(ctx, AD_Client_ID, AD_Org_ID, M_Product_ID, M_CostType_ID, C_AcctSchema_ID, costingMethod, M_CostElement_ID,
					M_AttributeSetInstance_ID, dateAcct, trxName);
		}
		
		if (history != null)
			return history;
		
		// get from MCost
		return get(ctx, AD_Client_ID, AD_Org_ID, M_Product_ID, M_CostType_ID, C_AcctSchema_ID, M_CostElement_ID, M_AttributeSetInstance_ID, trxName);
	}	//	get

	@Deprecated
	public static MCost get (Properties ctx, int AD_Client_ID, int AD_Org_ID, int M_Product_ID,
			int M_CostType_ID, int C_AcctSchema_ID, int M_CostElement_ID,
			int M_AttributeSetInstance_ID)
	{
		return get(ctx, AD_Client_ID, AD_Org_ID,
				M_Product_ID, M_CostType_ID, C_AcctSchema_ID, M_CostElement_ID,
				M_AttributeSetInstance_ID,
				null); // trxName
	}
	
	/**	Logger	*/
	private static CLogger 	s_log = CLogger.getCLogger (MCost.class);

    /**
     * UUID based Constructor
     * @param ctx  Context
     * @param M_Cost_UU  UUID key
     * @param trxName Transaction
     */
    public MCost(Properties ctx, String M_Cost_UU, String trxName) {
        super(ctx, M_Cost_UU, trxName);
		if (Util.isEmpty(M_Cost_UU))
			setInitialDefaults();
    }

	/**
	 * 	Standard Constructor
	 *	@param ctx context
	 *	@param ignored multi-key
	 *	@param trxName trx
	 */
	public MCost (Properties ctx, int ignored, String trxName)
	{
		super (ctx, ignored, trxName);
		if (ignored == 0)
			setInitialDefaults();
		else
			throw new IllegalArgumentException("Multi-Key");
	}	//	MCost

	/**
	 * Set the initial defaults for a new record
	 */
	private void setInitialDefaults() {
		setM_AttributeSetInstance_ID(0);
		//
		setCurrentCostPrice (Env.ZERO);
		setFutureCostPrice (Env.ZERO);
		setCurrentQty (Env.ZERO);
		setCumulatedAmt (Env.ZERO);
		setCumulatedQty (Env.ZERO);
	}

	/**
	 * 	Load Constructor
	 *	@param ctx context
	 *	@param rs result set
	 *	@param trxName trx
	 */
	public MCost (Properties ctx, ResultSet rs, String trxName)
	{
		super (ctx, rs, trxName);
		m_manual = false;
	}	//	MCost

	/**
	 * 	Parent Constructor
	 *	@param product Product
	 *	@param M_AttributeSetInstance_ID asi
	 *	@param as Acct Schema
	 *	@param AD_Org_ID org
	 *	@param M_CostElement_ID cost element
	 */
	public MCost (MProduct product, int M_AttributeSetInstance_ID,
		MAcctSchema as, int AD_Org_ID, int M_CostElement_ID)
	{
		this (product.getCtx(), 0, product.get_TrxName());
		setClientOrg(product.getAD_Client_ID(), AD_Org_ID);
		setC_AcctSchema_ID(as.getC_AcctSchema_ID());
		setM_CostType_ID(as.getM_CostType_ID());
		setM_Product_ID(product.getM_Product_ID());
		setM_AttributeSetInstance_ID(M_AttributeSetInstance_ID);
		setM_CostElement_ID(M_CostElement_ID);
		//
		m_manual = false;
	}	//	MCost

	/** Data is entered Manually		*/
	protected boolean m_manual = true;

	/**
	 * 	Add to Cumulative Amt/Qty and Current Qty
	 *	@param amt amt
	 *	@param qty qty
	 */
	public void add (BigDecimal amt, BigDecimal qty)
	{
		MCostElement costElement = (MCostElement) getM_CostElement();
		if (costElement.isAveragePO() || costElement.isAverageInvoice()) 
		{
			if (getCurrentQty().add(qty).signum() < 0)
			{
				throw new AverageCostingNegativeQtyException("Product(ID)="+getM_Product_ID()+", Current Qty="+getCurrentQty()+", Trx Qty="+qty
						+ ", CostElement="+costElement.getName()+", Schema="+getC_AcctSchema().getName());
			}
		}
		setCumulatedAmt(getCumulatedAmt().add(amt));
		setCumulatedQty(getCumulatedQty().add(qty));
		setCurrentQty(getCurrentQty().add(qty));
	}	//	add

	/**
	 * 	Add to cumulative Amt/Qty, current qty and calculate new weighted average cost.<br/>
	 * 	((OldAvg*OldQty)+(Price*Qty)) / (OldQty+Qty).
	 *	@param amt total amt (price * qty)
	 *	@param qty qty
	 */
	public void setWeightedAverage (BigDecimal amt, BigDecimal qty)
	{
		//do nothing when amt and qty is zero
		if (amt.signum() == 0 && qty.signum() == 0)
			return; 
		
		//amount must follow the sign of qty
		if (amt.signum() != 0 && qty.signum() != 0 && amt.signum() != qty.signum())
		{
			amt = amt.negate();
		}
		
		//can't do cost adjustment if there's no stock left
		if (qty.signum() == 0 && getCurrentQty().signum() <= 0)
		{
			throw new AverageCostingZeroQtyException("Product(ID)="+getM_Product_ID()+", Current Qty="+getCurrentQty()+", Trx Qty="+qty
					+", CostElement="+getM_CostElement().getName()+", Schema="+getC_AcctSchema().getName());
		}
		
		if (getCurrentQty().add(qty).signum() < 0)
		{
			throw new AverageCostingNegativeQtyException("Product(ID)="+getM_Product_ID()+", Current Qty="+getCurrentQty()+", Trx Qty="+qty
					+", CostElement="+getM_CostElement().getName()+", Schema="+getC_AcctSchema().getName());
		}
				
		BigDecimal sumQty = getCurrentQty().add(qty);
		if (sumQty.signum() != 0)
		{
			BigDecimal oldSum = getCurrentCostPrice().multiply(getCurrentQty());
			BigDecimal oldCost = oldSum.divide(sumQty, 12, RoundingMode.HALF_UP);
			BigDecimal newCost = amt.divide(sumQty, 12, RoundingMode.HALF_UP); //amt is total already
			BigDecimal cost = oldCost.add(newCost);
			if (cost.scale() > (getPrecision()*2))
			{
				cost = cost.setScale((getPrecision()*2), RoundingMode.HALF_UP);
			}
			setCurrentCostPrice(cost);
		}
		//
		setCumulatedAmt(getCumulatedAmt().add(amt));
		setCumulatedQty(getCumulatedQty().add(qty));
		setCurrentQty(getCurrentQty().add(qty));
	}	//	setWeightedAverage

	/**
	 *	@param amtUnit unit amt
	 */
	public void setWeightedAverageInitial (BigDecimal amtUnit)
	{
		BigDecimal cost = amtUnit;
		if (cost.scale() > (getPrecision()*2))
		{
			cost = cost.setScale((getPrecision()*2), RoundingMode.HALF_UP);
		}
		setCurrentCostPrice(cost);
	}	//	setWeightedAverageInitial

	/**
	 * 	Get Costing Precision
	 *	@return precision (6)
	 */
	protected int getPrecision()
	{
		MAcctSchema as = MAcctSchema.get(getCtx(), getC_AcctSchema_ID());
		if (as != null)
			return as.getCostingPrecision();
		return 6;
	}	//	gerPrecision

	/**
	 * 	Set Current Cost Price
	 *	@param currentCostPrice if null set to 0
	 */
	public void setCurrentCostPrice (BigDecimal currentCostPrice)
	{
		if (currentCostPrice != null)
			super.setCurrentCostPrice (currentCostPrice);
		else
			super.setCurrentCostPrice (Env.ZERO);
	}	//	setCurrentCostPrice

	/**
	 * 	Get History Average (Amt/Qty)
	 *	@return average if amt/aty &lt;&gt; 0 otherwise null
	 */
	public BigDecimal getHistoryAverage()
	{
		BigDecimal retValue = null;
		if (getCumulatedQty().signum() != 0
			&& getCumulatedAmt().signum() != 0)
			retValue = getCumulatedAmt()
				.divide(getCumulatedQty(), getPrecision(), RoundingMode.HALF_UP);
		return retValue;
	}	//	getHistoryAverage

	/**
	 * 	String Representation
	 *	@return info
	 */
	@Override
	public String toString ()
	{
		StringBuilder sb = new StringBuilder ("MCost[");
		sb.append ("AD_Client_ID=").append (getAD_Client_ID());
		if (getAD_Org_ID() != 0)
			sb.append (",AD_Org_ID=").append (getAD_Org_ID());
		sb.append (",M_Product_ID=").append (getM_Product_ID());
		if (getM_AttributeSetInstance_ID() != 0)
			sb.append (",AD_ASI_ID=").append (getM_AttributeSetInstance_ID());
		sb.append (",M_CostElement_ID=").append (getM_CostElement_ID());
		//
		sb.append (", CurrentCost=").append (getCurrentCostPrice())
			.append (", C.Amt=").append (getCumulatedAmt())
			.append (",C.Qty=").append (getCumulatedQty())
			.append ("]");
		return sb.toString ();
	}	//	toString

	/**
	 * 	Get Cost Element
	 *	@return cost element
	 */
	public MCostElement getCostElement()
	{
		int M_CostElement_ID = getM_CostElement_ID();
		if (M_CostElement_ID == 0)
			return null;
		return MCostElement.getCopy(getCtx(), M_CostElement_ID, get_TrxName());
	}	//	getCostElement

	/**
	 * 	Validate costing level configuration.
	 *  Validate CurrentQty is positive for average costing. 
	 *	@param newRecord new
	 *	@return true if can be saved
	 */
	@Override
	protected boolean beforeSave (boolean newRecord)
	{
		//The method getCostElement() not should be cached because is a transaction
		MCostElement ce = (MCostElement)getM_CostElement();
		//	Check if data entry makes sense
		if (m_manual)
		{
			MAcctSchema as = new MAcctSchema (getCtx(), getC_AcctSchema_ID(), null);
			MProduct product = MProduct.get(getCtx(), getM_Product_ID());
			String CostingLevel = product.getCostingLevel(as);
			if (MAcctSchema.COSTINGLEVEL_Client.equals(CostingLevel))
			{
				// AD_Org_ID and M_AttributeSetInstance_ID must be 0 for client costing level
				if (getAD_Org_ID() != 0 || getM_AttributeSetInstance_ID() != 0)
				{
					log.saveError("CostingLevelClient", "");
					return false;
				}
			}
			else if (MAcctSchema.COSTINGLEVEL_BatchLot.equals(CostingLevel))
			{
				// M_AttributeSetInstance_ID must > 0 if costing level is batch lot
				if (getM_AttributeSetInstance_ID() == 0
					&& ce.isCostingMethod())
				{
					log.saveError("FillMandatory", Msg.getElement(getCtx(), "M_AttributeSetInstance_ID"));
					return false;
				}
				if (getAD_Org_ID() != 0)
					setAD_Org_ID(0);
			}
		}

		//	Calculated cost element can't be entered manually by user
		if (m_manual && ce != null && ce.isCalculated())
		{
			log.saveError("Error", Msg.getElement(getCtx(), "IsCalculated"));
			return false;
		}
		// Rules for Percentage field
		if (ce != null)
		{
			// Reset Percent to 0 if cost element is material type or calculated
			if (ce.isCalculated()
				|| MCostElement.COSTELEMENTTYPE_Material.equals(ce.getCostElementType())
				&& getPercent() != 0)
				setPercent(0);
		}
		// Reset CurrentCostPrice, FutureCostPrice, CumulatedAmt and CumulatedQty to 0 if using Percent 
		if (getPercent() != 0)
		{
			if (getCurrentCostPrice().signum() != 0)
				setCurrentCostPrice(Env.ZERO);
			if (getFutureCostPrice().signum() != 0)
				setFutureCostPrice(Env.ZERO);
			if (getCumulatedAmt().signum() != 0)
				setCumulatedAmt(Env.ZERO);
			if (getCumulatedQty().signum() != 0)
				setCumulatedQty(Env.ZERO);
		}
		
		//Throw exception if CurrentQty have been updated to negative and cost element is average costing
		if (ce!=null && (ce.isAveragePO() || ce.isAverageInvoice()) && is_ValueChanged(COLUMNNAME_CurrentQty)) 
		{
			if (getCurrentQty().signum() < 0)
			{
				throw new AverageCostingNegativeQtyException("Product(ID)="+getM_Product_ID()+", Current Qty="+getCurrentQty()
						+", CostElement="+getM_CostElement().getName()+", Schema="+getC_AcctSchema().getName());
			}
		}
		
		return true;
	}	//	beforeSave

	/**
	 * Throw {@link AverageCostingNegativeQtyException} if cost element is average po or average invoice and currentQty &lt; 0.
	 * @param CurrentQty
	 */
	@Override
	public void setCurrentQty(BigDecimal CurrentQty) {
		MCostElement ce = (MCostElement)getM_CostElement();
		if (ce.isAveragePO() || ce.isAverageInvoice()) 
		{
			if (CurrentQty.signum() < 0)
			{
				throw new AverageCostingNegativeQtyException("Product="+getM_Product().getName()+", Current Qty="+getCurrentQty()+", New Current Qty="+CurrentQty
						+", CostElement="+ce.getName()+", Schema="+getC_AcctSchema().getName());
			}
		}
		super.setCurrentQty(CurrentQty);
	}
}	//	MCost
