Problem 11-2 Your answer is partially correct. Try again. The cost of equipment purchased by Cullumber, Inc., on June 1, 2017, is $108,580. It is estimated that the machine will havea $6,100 salvage value at the end of its service life. Its service life is estimated at 7 years, its total working hours are estimated at 51,240, and its total production is estimated at 640,500 units. During 2017, the machine was operated 7,320 hours and produced 67,100 units. During 2018, the machine was operated 6,710 hours and produced 58,560 units. Compute depreciation expense on the machine for the year ending December 31, 2017, and the year ending December 31, 2018, using the following methods. (Round depreciation per unit to 2 decimal places, e.g. 15.25 and final answers to 0 decimal places, e.g. 45,892.) 2017 2018 8540s (a) Straight-line (b) Units-of-output (c) Working hours (d) Sum-of-the-years'-digits 14640 10736 9370 14640 13420 25620 21960 (e) Double-declining-balance (twice the straight-line rate) 29284 21386