Hayden Company is considering the acquisition of a machine that costs $547,000. The machine is expected to have a useful life of 6 years, a negligible residual value, an annual net cash inflow of $93,000, and annual operating income of $79,050. The estimated cash payback period for the machine is (round to one decimal place) 10, 1,2 years b. 5.9 year c. 5.1 yean d 6.9 years