Compuse the cash paybock periad for DO ITt 12.1 (LO 1), AP Wayne Company is considering a long-term Investment project called an invatment. ZIP. ZIP will require an investment of $140,000, It will have a useful life of 4 years and no salvage value. Annual cash inflows would increase by $80,000, and annual cash outflows would increase by $40,000. Compute the cash payback period..