Equipment was purchased for $150,000. Freight charges amounted to $7,000 and there was a cost of $20,000 for building a foundation and installing the equipment. It is estimated that the equipment will have a $30,000 salvage value at the end of its 5-year useful life. Depreciation expense each year using the straight-line method will be"

a. $35,400. b. $29,400. c. $24,600. d. $24,000.