A compary is considering purchasing a machine that costs $560000 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 $240000 and annual operating expenses exclusive of depreciation expense are expected to be $42000. The straight-line method of depreciation would be used. The cash payback period on the machine is 3.8 years. 1.9 years. 8.0 years: 2.8 years