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DuPage Company purchases a factory machine at a cost of 18,000 on January 1, 2014. DuPage expects the machine to have a residual value of 2,000 at the end of its 4-year useful life. During its useful life, the machine is expected to be used 160,000 hours. Actual annual hourly use was 2014, 40,000; 2015, 60,000; 2016, 35,000; and 2017, 25,000. Instructions Prepare depreciation schedules for the following methods: (a) straight-line, (b) units-of- activity, and (c) declining-balance using double the straight-line rate