Birch manufacturing is considering the addition of another product line to its offerings. Equipment needed to produce the new line will cost $209,400. Birch estimates that the net cash inflows from the new product line will be as follows:

Years 1-10		$18,270	(each year)
Years 11-15		$5,340	(each year)
Year 16-20		$1,930

What is the payback period for the new product line?

Payback period

years