Computing Service-Hours Depreciation
The company acquired a machine on January 1 at an original cost of $60,000. The machine's estimated residual value is $10,000, and its estimated life is 10,000 service hours. The actual usage of the machine was as follows: Year 1, 2,000 hours; Year 2, 5,000 hours; Year 3, 2,000 hours; Year 4, 1,000 hours. Compute (1) depreciation expense for each year of the machine's life and (2) book value at the end of each year of the machine's life.