Only provide the answer for the case where Amanda wants to pay herself at the beginning of each month.

4-16 Compute the amount Amanda must deposit in an account today so that she can pay herself $450 per month for the next nine years if her opportunity cost rate is 8.4 percent compounded monthly. How much must Amanda deposit today if she wants to pay herself at the beginning of each month? (LO 4-3 & 4-5)