123. An asset was purchased for $150,000. It had an estimated salvage value of $30,000 and an estimated useful life of 10 years. After 5 years of use, the estimated salvage value is revised to $24,000 but the estimated useful life is unchanged. Assuming straight-line depreciation, depreciation expense in year 6 would be a. $18,000. b. $13,200. C. $9,000. d. $12,600. Plant Assets, Natural Resources, and Intangible Assets 10 - 19 124 Equipment costing $30,000 with a salvage value of $6,000 and an estimated life of 8 years has been depreciated using the straight-line method for 2 years. Assuming a revised estimated total life of 5 years and no change in the salvage value, the depreciation expense for year 3 would be a. $3,600 b. $8,000. C. $6,000 d. $4,800