Keating Co. is considering disposing of equipment with a cost of $75,000 and accumulated depreciation of $52,500. Keating Co. can sell the equipment through a broker for $29,000, less a 9% broker commission. Alternatively, Gunner Co. has offered to lease the equipment for five years for a total of $50,000. Keating will incur repair, insurance, and property tax expenses estimated at $10,000 over the five-year period. At lease-end, the equipment is expected to have no residual value. The net differential income from the lease alternative is Oa. $16,332 Ob. $13.610 Oc. $9,527 Od. $20,415