A company is considering purchasing a machine that costs $600000 and is estimated to have no salvage value at the end of its 8 -year useful life. If the machine is purchased, arnual revenues are expected to be $250000 and annual operating expenses exclusive of depreciation expense are expected to be $46000. The straight-line method of depreciation would be used. The cash payback period on the machine is 1.9 years. 3,9 years 8.0 years 2.9 years