Amazon Company management is considering the purchase of new equipment that would cost $536,000 and have a 7 year life with no salvage value. The equipment would allow Amazon to expand its capacity, increasing sales revenues by $373,000 per year and also increasing cash operating expenses by $215,500 per year . (Ignore income taxes) Required: Determine Amazon's simple rate of return on the investment (Round your answer to 1 decimal place.) Simple rate of retum %