A company is considering purchasing factory equipment that costs $480,000 and is estimated to have no salvage value at the end of its 8-year useful life. If the equipment is purchased, annual revenues are expected to be $135,000 and annual operating expenses before depreciation expense are expected to be $39000. The straight-line method of depreciation would be used. The cash payback period on the equipment is

A. 13.3 B. 8.0 C.5.0 D. 2.5