A company purchased factory equipment on April 1, 2012 for $80,000. It is estimated that the equipment will have an $10,000 salvage value at the end of its 10-year useful life. Using the straight-line method of depreciation, the amount to be recorded as depreciation expense at December 31, 2012 is a. $8,000. b. $7,000. c. $5,250. d. $6,000