Birch manufacturing is considering the addition of another product line to its offerings. Equipment needed to produce the new line will cost $192,410. Birch estimates that the net cash inflows from the new product line will be as follows: Years 1-10 $17,750 (each year) Years 11-15 $4,970 (each year) Year 16-20 $2,070

If the company can establish a steady customer base before production starts and the cash inflows will be $14,400 per year for years 1 15, what will be the payback period? (Round answer to 2 decimal places, e.g. 1.64.)

The payback period years?