Exercise 16-14A (Algo) Determining the unadjusted rate of return LO 16-4 Zachary Painting Company is considering whether to purchase a new spray paint machine that costs $5,000. The machine is expected to save labor increasing net income by 5750 per year. The effective life of the machine is 15 years according to the manufacturer's estimate Required 6. Determine the unadjusted rate of return based on the average cost of the investment (Enter your onewer as a whole percentage (e.g. 0.55 should be entered os 55).) United rate of return