1. Jalloh Company purchased machinery for $162,000 on January 1, 2017. It is estimated that the machinery will have a useful life of 20 years, salvage value of $15,000, production of 84,000 units, and working hours of 42,000. During 2017, the company uses the machinery for 14,300 hours, and the machinery produces 20,000 units. Compute depreciation under the straight-line, unit of output, working hours, sum of the years digits, and double-declining balance methods.