Save & Exit Submit TB 09-83 When originally purchased, a vehicle had cos..... When originally purchased, a vehicle hed cost $23,000, with an estimated residual value of $1,500, and an estimated useful life of 8 years After 4 years of straight line depreciation, the estimated useful life was revised from 8 to 6 years, but with zero residual value. The depreciation expense in year 5 should be