The management of Kissinger Corporation is investigating automating a process. Old equipment, with a current salvage value of $23,000, would be replaced by a new machine. The new machine would be purchased for $330,000 and would have a 6 year useful life and no salvage value. By automating the process, the company would save $108,000 per year in cash operating costs. what the simple rate of return on the investment is closest to: