A company is considering purchasing factory equipment that costs $400000 and is estimated to have no salvage value at the end of its 5-vear usefullife. fthe equipment is burchased. annual revenues are expected to be $143000 and annual operating expenses exclusive of depreciation expense are expected to be $30000. The straight-line method of depreciation would be used. Ifthe eguinment is burchased. the annual rate of return expected on this equinment is