Hayden Company is considering the acquisition of a machine that costs $327,000. The machine is expected to have a useful life of 6 years, a negligib residual value, an annual net cash inflow of $80,000, and annual operating income of $68,000. The estimated cash payback period for the machine is (round to one decimal place) . 60 yearn Ob 12 year e yara d. 1 yin