An Anticipated Purchase of Equipment for $520,000, with a Useful

An anticipated purchase of equipment for $520,000, with a useful life of eight years and no residual value, is expected to yield the following annual net income and net cash flow:? $$\begin{array} { c r r } \text { Year } & \text { Net Income } & \text { Net Cash Flow } \\1 & \$ 60,000 & \$ 120,000 \\2 & 50,000 & 110,000 \\3 & 50,000 & 110,000 \\4 & 40,000 & 100,000 \\5 & 40,000 & 80,000 \\6 & 40,000 & 80,000 \\7 & 40,000 & 60,000 \\8 & 40,000 & 60,000\end{array}$$ What is the cash payback period?

A) 5 years
B) 4 years
C) 6 years
D) 3 years