needs android app to do a simple calculation. i can do it in excel but I want a quicker way to calculate.very small budget $30 for the appApp modifiable fieldsP1 = numberT1 = percentM1 = numberD1 = percentD2 = percentE1 = numberResult (the calculation) = ((((P1 * (1-D1/100)) * (1-D2/100)) * (1 + T1