Determine the payback period in years for a project that costs $90,000 and would yield after-tax cash flows of $18,000 the first year, $20,000 the second year, $23,000 the third year, $25,000 the fourth year, $29,000 the fifth year, and $35,000 the sixth year.

3.36
	3.49
	3.90
	4.14
	4.36