An engineer planning for her son’s college education made deposits into a separate brokerage account every time she earned extra money from side consulting jobs. The amounts and timing of the deposits are shown below.

Year Amount, $
0 5,000 3 8,000 4 9,000 7 15,000 11 16,000 17 20,000 If the account increased at a market rate of 15% per year and inflation averaged 3% per year over the entire deposit period, determine the purchasing power in terms of year-zero dollars immediately after the last deposit in year 17.