Golab Roofing is considering the purchase of a crane that would cost $69,846, would have a useful life of 6 years, and would have no salvage value. The use of the crane would result in labor savings of $21,000 per year. The internal rate of return on the investment in the crane is closest to (Ignore income taxes.):
C) 19%
A) 18%
B) 20%
D) 17%