A company is considering purchasing a machine that costs $248000 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 $90000 and annual operating expenses exclusive of depreciation expense are expected to be $38000. The straight-line method of depreciation would be used. If the machine is purchased, the expected annual rate of return on this machine is 41.9% 21.0% 8.5%. 16.9\%