Crane Enterprises is considering investing in a new packing machine. The new machine will provide annual cash operating inflows of $15590 for 5 years. The cost of the machine is $53390 and it can be sold at the end of its 5-year useful life for $8430. Keltner's required rate of return is 10%. What is the packing machine's payback period? O 3.42 years O 6.33 years O 4.48 years O 7.46 years