Martin Company purchases a machine at the beginning of the year at a cost of $68,000. The machine is depreciated using the straight-line method. The machine's useful life is estimated to be 5 years with a $8,000 salvage value. Depreciation expense in year 4 is:

Multiple Choice

• $13,600.
• $12,000.
• $60,000.
• $54,400.
• $0.