Question - Indigo Company purchased machinery for $147,000 on January 1, 2017. It is estimated that the machinery will have a useful life of 20 years, salvage value of $14,700, production of 81,900 units, and working hours of 38,400. During 2017, the company uses the machinery for 14,592 hours, and the machinery produces 18,837 units. Compute depreciation under the straight-line, units-of-output, working hours, sum-of-the-years'-digits, and double-declining-balance methods.