Balance sheet $135,000 Equipment Less: Accumulated Depreciation Net book value (30,000) 105,000 $125,000 (25,000) 100,000 Income statement 15,000 Depreciation expense Gain on sale of equipment 17,000 25,000 0 In 2019, Sparty's Pizza sold a piece of equipment for $31,000 and spent $28,000 buying new equipment. What was the historical cost of the equipment sold? $12,000 $20,000 S35,000 $18.000