Birch manufacturing is considering the addition of another product line to its offering Equipment needed to produce the new line will cost $210,960 Birch estimates that the net cash inflows from the new product line will be as follows: Years 1-10 Years 11-15 Year 16-20 $19,200 (each year) $4,740 teach year) $2,040 What is the payback period for the new product line? Payback period