A company is considering purchasing a machine that costs $ 440000 and is estimated to have no salvage value at the end of its 8-year useful life. If the machine is purchased, annual revenues are expected to be $ 170000 and annual operating expenses exclusive of depreciation expense are expected to be $30000. The straight-line method of depreciation would be used. The cash payback period on the machine is O 3.1 years. O 2.0 years 4.1 years. O 8.0 years