Rainbow Products is considering the purchase of a paint-mixing machine to reduce labor costs. The savings are expected to result in additional cash flows to Rainbow of $5,000 per year. The machine costs $35,000 and is expected to last for 15 years. Rainbow has determined that the cost of capital for such an investment is 12%. [A] Compute the payback, net present value (NPV), and internal rate of return (IRR) for this machine. Should Rainbow purchase it? Assume that all cash flows (except the initial purchase) occur at the end of the year, and do not consider taxes.