A diesel-powered tractor with a cost of $180,000 and estimated residual value of $18,000 is expected to have a useful operating life of 36,000 hours. During February, the tractor was operated 156...

A diesel-powered tractor with a cost of $180,000 and estimated residual value of $18,000 is expected to have a useful operating life of 36,000 hours. During February, the tractor was operated 156 hours. Determine the depreciation for the month.

A John Deere tractor acquired on January 4 at a cost of $120,000 has an estimated useful life of 25 years. Assuming that it will have no residual value, determine the depreciation for each of the first two years (a) by the straight-line method and (b) by the doubledeclining-balance method.