public List<Sales_Tax_B> Get_Sales_Tax_B(int Custom_Invoice_ID)
        {
            List<Sales_Tax_B> _List_Collection = new List<Sales_Tax_B>();

            DataTable dt = Sales_Tax_DA.Get_Sales_Tax_B(Custom_Invoice_ID);

            foreach (DataRow row in dt.Rows)
            {
                Sales_Tax_B _Sales_Tax_B = new Sales_Tax_B();

                _Sales_Tax_B.Quantity = int.Parse(row["Quantity"].ToString());
                _Sales_Tax_B.Unit = row["Unit"].ToString();
                _Sales_Tax_B.Fcy = float.Parse(row["Fcy"].ToString());

                _List_Collection.Add(_Sales_Tax_B);
            }

            return _List_Collection;
        }
        public List<Sales_Tax_B> Get_Collection(int ID)
        {
            List<Sales_Tax_B> _List_Collection = new List<Sales_Tax_B>();

            DataTable dt = Sales_Tax_DA.Get_Collection(ID);

            foreach (DataRow row in dt.Rows)
            {
                Sales_Tax_B _Sales_Tax_B = new Sales_Tax_B();

                _Sales_Tax_B.ID = int.Parse(row["ID"].ToString());
                _Sales_Tax_B.Quantity = int.Parse(row["Quantity"].ToString());
                _Sales_Tax_B.Unit = row["Unit"].ToString();
                _Sales_Tax_B.Description = row["Description"].ToString();
                _Sales_Tax_B.Fcy = float.Parse(row["Fcy"].ToString());
                _Sales_Tax_B.ExchangeRate = float.Parse(row["ExchangeRate"].ToString());
                _Sales_Tax_B.ST_Rate = float.Parse(row["ST_Rate"].ToString());

                _List_Collection.Add(_Sales_Tax_B);
            }

            return _List_Collection;
        }