For the final standard future value calculation, suppose that you know when you want to reach your goal, how much you can deposit each period, and how much the interest rate will be. What, then, do you need to deposit initially to achieve your future value target? To find the answer, you use the PV() function, which uses the following syntax from the point of view of an investment:
PV(rate, nper, pmt, fv, [type])