A machine can be purchased for $150,000 and used for 5 years, yielding the following net incomes. In projecting net incomes, straight line depreciation is applied, using a 5-year life and a zero salvage value. Compute the machines payback period (ignore taxes). (Round the payback period to three decimals.)

...............................year 1.............year 2............year 3..............year 4...........year 5

Net cash flows 10,000 25,000 50,000 37,500 100,000