Total Amount of Purchase Order in X++

Method 1: 

public AmountCur totalAmount()

       // PurchLine       purchLine;

        AmountCur       amountCur = 0;

        while select crosscompany purchLine

            index hint PurchLineIdx

            where purchLine.PurchId         == purchtables.PurchId

              && !purchLine.IsDeleted

        {

           // amountCur += purchLine.calcLineAmountExclTax(purchLine.PurchQty );

                

           amountCur += purchLine.calcLineAmount(purchLine.PurchQty + purchLine.ConfirmedTaxAmount );

                

        }

        return amountCur;