On June 1, Aaron Company purchased equipment at a cost of $120,000 that has a depreciable cost of $90,000 and an estimated useful life of 3 years and 30,000 hours, which ends on December 31. Using straight-line depreciation, calculate depreciation expense for the final (partial) year of service. (A) 40,000 (B) 17,500 (C) 30,000 (D) 12,500