Jack and Diane decided to remodel their kitchen. They removed their old cabinets and replaced them with newer, nicer cabinets. They installed the old cabinets in a rental home that they own and lease to other people. The original cost of the old cabinets was $6,000. The fair market value on the date they were installed in the rental house was $2,500. The cost of the new cabinets was $11,000. What amount should Jack and Diane use as the basis for depreciation for the cabinets that have been installed in the rental property?