Mr. Quixote is considering an investment in alternative energy. He estimates that the project has annual cash inflows of $5,100, $3,200, $4,400, and $3,600, for the next four years, respectively. The discount rate is 15 percent.

What is the discounted payback period for these cash flows if the initial cost is $7,100? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.)

Discounted payback period

years