11. On June 30, 2001, Darjani Enterprises sold equipment with an original cost of $99,000 for $40,000. The equipment was purchased January 1, 2000, and was amortized using the straight-line method assuming a five year useful life and $9,000 salvage value. The necessary entries for 2001 include a a. debit to Accumulated Amortization-Equipment for $18,000. b. credit to Gain on Sale of Equipment for $32,000. c. credit to Cash for $40,000. d. debit to Amortization Expense for $9,000.