A machine that lasts four years has the following net cash outflows: $12,500 to purchase the machine and $7,500 for the annual year-end operating cost. At the end of four years, the machine is sold for $3,200; thus, the cash flow at year 4, C4, is only $4,300:

The cost of capital is 8 percent. What is the PV of the costs of operating a series of such machines in perpetuity?

Co 12,500 $7,500 C, $4,300 C. $7,500 $7,500