Chris, a computer expert, exchanged a business auto for a new one from a car dealer named Ryan, the best auto dealer man in town. The undepreciated cost of his auto was $ 4000 and a FMV of $4500. Chris could have purchased the auto for a cash price of $ 22,000 without trade-in. He paid $ 19,000 with his auto trade-in. The auto he purchased had a list price of $ 24,000. At what amount should Chris record his new auto?

a) 26,000

b) 22,000

c) 23,500

d) 24,000