Walken Hardware is adding a new product line that will require an investment of $ $1$ comma $540$ comma $000.$ Managers estimate that this investment will have a$10-$year life and generate net cash inflows of $ $310$ comma $000$ the first$$ year, $ $280$ comma $000$ the second$$ year, and $ $240$ comma $000$ each year thereafter for eight years. The investment has no residual value. Compute the ARR for the investment. First, enter the$$ formula, then compute the ARR of the new product line. $($Enter your answer as a percent rounded to two decimal$$ places$)$