Wayne Company is considering a long-term investment project called ZIP. ZIP will require an investment of 142,000 dollars. It will have a useful life of 4 years and no salvage value. Annual cash inflows would increase by 80,000 dollars, and annual cash outflows would increase by 41,800 dollars. Compute the cash payback period. (Round answer to 2 decimal places, e.g. 10.50.)