public BOItemSaleLine(Accountant accountant, Sale _sale, ItemSaleLine _line, BOContext context)
            : base(accountant, _sale, _line, context)
        {
            mObjectID       = BOType.BOItemSaleLine;
            mDataProxy      = _line.Clone() as ItemSaleLine;
            mDataProxy.Sale = _sale;

            if (mDataProxy.Sale.IsTaxInclusive == "Y")
            {
                mPrice = mDataProxy.TaxInclusiveUnitPrice;
            }
            else
            {
                mPrice = mDataProxy.TaxExclusiveUnitPrice;
            }
        }