Can someone help me understand this?

The Boromir Co. bought a piece of equipment in 2018 that will be used by its sales force. Boromir recorded depreciation expense of $1 0,500 in 2019. Boromir estimated that the equipment would have a residual value of $5,200 and a useful life of 6 years. How much did Boromir originally pay for the equipment? The company uses straight-line depreciation A a. $15,700 A b. $57,800 A c. $63,000 A d. $68,200 A e. None of the above