Roberts Hardware is adding a new product line that will require an investment of $1,476,000. Managers estimate that this investment will have a 10-year life and generate net cash inflows of $310,000 the first year, $290,000 the second year, and $250,000 each year thereafter for eight years. Compute the payback period. Round to one decimal place. ... The payback in years is Enter any number in the edit fields and then click Check