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Mercer corporation is considering replacing a technologically obsolete machine with a new state-of-the-art numerically controlled machine. The new machine would cost $140,000 and would have a fourteen-year useful life. Unfortunately the new machine would have no salvage value. The new machine would cost $18,000 per year to operate and maintain but would save $48,000 per year in labor and other costs. The old machine can be sold now for scrap for $14,000. The simple rate of return on the new machine is closest to: (Ignore income taxes in this problem.) 14.29% 34.29% 31.75% 15.87%