void SumarTotales() { double douPrecioTotal = 0; double douPrecioTotalSinIGV = 0; double douValorIGV = 0; douPrecioTotal = funFlex.FlexSumarCol(FgDetalle, 5, 1, FgDetalle.Rows.Count - 1); douPrecioTotalSinIGV = funFlex.FlexSumarCol(FgDetalle, 9, 1, FgDetalle.Rows.Count - 1); LblImpBru.Text = douPrecioTotalSinIGV.ToString("0.00"); LblTotal.Text = douPrecioTotal.ToString("0.00"); douValorIGV = (douPrecioTotal - douPrecioTotalSinIGV); LblIgv.Text = douValorIGV.ToString("0.00"); }