Assume that Penguin Co. is considering disposing of equipment that cost $50,000 and has $40,000 of accumulated depreciation to date. Penguin Co. can sell the equipment through a broker for $25,000 less 5% commission. Alternatively, Teal Co. has offered to lease the equipment for five years for a total of $48,750. Penguin will incur repair, insurance, and property tax expenses estimated at $10,000. At lease-end, the equipment is expected to have no residual value. The net differential income from the lease alternative is:

a. $ 5,000

b. $12,500

c. $15,000

d. $25,000