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

	Year 1	Year 2	Year 3	Year 4	Year 5
Net Income	$10,000	$25,000	$50,000	$37,500	$100,00