Assume a machine that has a useful life of only one year costs $2,000. Assume, also, that net of such operating costs as power, taxes, and so forth, the additional revenue from the output of this machine is expected to be $2,300. The expected rate of return on this machine is:
A. 20 percent.
B. 7.5 percent.
C. 10 percent.
D. 15 percent