47. Helm Corporation purchased a machine with an initial cost of $80,000, a residual value of $5,000, and an estimated useful life of 10 years. At the beginning of the fth year, Helm spent $10,000 for an extraordinary repair. Following the repair, Helm estimated that the machine had a remaining useful life of 8 years, and that the residual value was unchanged. Calculate depreciation expense on the machine for the fth year, assuming that Hehn uses the straight-line method. A. $5,625 B. $6,875 C. $7,250 D. $7,500