Skysung Cunpeny purchased machinery or $163,800 on January 1, 2017 ll is estimated that the machinery will have a useful life u 20 years, salvage value of $14,700 production of 84,200 units and working hours of 41,100. During 2017, the company uses the machinery for 20,139 hours, and the machinery produces 28,628 units. Compute depreciation under the straight-line, units-of-output, working hours, sum of the years' digits, and double declining balance methods. (Round intermediate calculations to 5 decimal places, e.g. 1.56487 and final answers to o decimal places, e.g. 5,125.) Depreciation Straight-line Units-of-output Working hours Sum-of-the-years-digits Double-declining-balance