A company purchased equipment on April 1, 2020, for $48,000 ($6,000 salvage value; 10-year useful life). Using the straight-line method of depreciation, the amount to be recorded as depreciation expense at December 31, 2020 is Select one: : a. None of the above O b. $4,800 o c. $3,150 d. $3,600 e. $4,200