a company is planning to purchase a machine that will cost $31,668, have a six-year life, and will have no salvage value. the company expects to sell the machine's output of 3,000 units evenly throughout each year. a projected income statement for each year of the asset's life appears below. what is the payback period for this machine? sales $ 117,000 costs: manufacturing $ 70,200 depreciation on machine 4,000 selling and administrative expenses 39,000 (113,200) income $ 3,800