Shields Company has gathered the following data on a proposed investment project: Investment required in equipment..... 5400,000 Annual cash inflows...... $80,000 Salvage value......$0 Life of the investment..... 10 years Discount rate........10% The simple rate of return on the investment is closest to: 20% 15% 5% 10% The payback period for the investment is closest to: 0.2 years 50 years 30 years 10years A cement manufacturer has supplied the following data