Mermaid Enterprises, a manufacturing firm, is considering investing $420,000 in a new machine.It is estimated that the net cash flow per year will be $150,000 and the machine will have a 5-year useful life. The residual value expected at the end of the 5-year life is $80,000.The accounting rate of return is:

a.35.7%

b.19.5%

c.32.8%

d.Unable to be determined from the information given

e.60%