Russnak Corporation is investigating automating a process by purchasing a new machine for $519,000 that would have a 6 year useful life and no salvage value. By automating the process, the company would save $135,000 per year in cash operating costs. The company's current equipment would be sold for scrap now, yielding $26,000. The annual depreciation on the new machine would be $86,506. (Ignore income taxes.) Required: Determine the simple rate of return on the investment (Round your answer to 1 decimal place.) Simple rate of retum