On March 1 of the current year, Lohan Company purchased and placed in service a machine with a cost of $240,000. The company estimated the machine's useful life to be four years or 60,000 total units of output with an estimated salvage value of $65,000. During the current year, 14,000 units were produced.
Prepare the necessary December 31 adjusting journal entry to record depreciation for the current year assuming the company uses:
a. The straight-line method of depreciation
b. The units-of-production method of depreciation
c. The double-declining balance method of depreciation.