Michelle Walker is saving to buy a house in five years. She
plans to put 20 percent down at that time, and she believes that
she will need $28,000 for the down payment. If Michelle can invest
in a fund that pays 6.80 percent annual interest, compounded
quarterly, how much will she have to invest today to have enough
money for the down payment? (If you solve this problem
with algebra round intermediate calculations to 6 decimal places,
in all cases round your final answer to the nearest
penny.)