When originally purchased, a vehicle had an estimated useful life of 12 years. The vehicle cost $63,000 and its estimated residual value is $4,000. After 3 years of straight-line depreciation, the assets total estimated useful life was revised from 12 years to 8 years and there was no change in the estimated residual value. The Depreciation Expense in year 4 is: $1,381 $8,850 $7,100 $7,375