An asset was purchased for $100,000. It had an estimated salvage value of $25,000 and an estimated useful life of 10 years. After 5 years of use, the estimated salvage value is revered to $20,000 but the estimated useful life is unchanged. Assuming straight line depreciation, depreciation expense in Year 6 would be $15,000. $10, 625. $8, 500. $12, 500