A compary 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, annual revenues are expected to be $200000 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 4.9 years. 3.9 years. 23 years. 8.0 years