Finlay Corporation is investigating automating a process by purchasing a machine for $225,000 that would have a 9 year useful life and no salvage value. By automating the process, the company would save $54,000 per year in cash operating costs. The new machine would replace some old equipment that would be sold for scrap now, yielding $24,000. The annual depreciation on the new machine would be $25,000. what is the simple rate of return on the investment ?