A machine can be purchased for $266,000 and used for five years, yielding the following net incomes. In projecting net incomes, double-declining depreciation is applied using a five-year life and a zero-salvage value. Year 1 Year 2 Year 3 Year 4 Year 5 Net income $ 19,500 $ 36,000 $ 60,000 $ 48,000 $ 139,000 Compute the machines payback period (ignore taxes