Keating Co. is considering disposing of equipment that cost $50,000 and has $40,000 of accumulated depreciation to date. Keating Co. can sell the equipment through a broker for $25,000 less 5% commission. Alternatively, Gunner Co. has offered to lease the equipment for five years for a total of $48,750. Keating will incur repair, insurance, and property tax expenses estimated at $8,000 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