Given the following cash inflow at the end of each year, what is the future value of this cash flow at 6%, 9%, and 15% interest rates at the end of the seventh year?
Year 1 ...... $15,000
Year 2 ...... $20,000
Year 3 ...... $30,000
Years 4 through 6 ... $ 0
Year 7 ..... $150,000