I am making a great progress, guided by you.i want to ask if the following expression is correct?if(Dropdownlist15 == "M2")thenNumericField10 = NumericField16 * NumericField8[0]if(Dropdownlist15 == "KG")thenNumericField10 = NumericField16 * NumericField5[0}elseendifwhere M2 and KG, NumericField 8[0]...