I need to calculate 3 numeric fields and have a "A" at the 4th textField. example numericField1=40 numericField2=40 numericField3=20 and numericfield4 is the sum of 1, 2 and 3 so the total is =100 on numericfield4if this total is 100 then the letter A has to be the value of TextField1I did it thi...