A machine can be purchased for $240,000 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$12,000$29,000$66,000$46,000$125,000

Compute the machine's payback period (ignore taxes).(Round payback period answer to 3 decimal places.)