ACCT3000 In-class Exercise P11-2 (Depreciation for Partial Periods - SL, Act., SYD, and DDB) The cost of equipment purchased by Charleston, Inc., on June 1, 2019, is $100,000. It is estimated that the machine will have a $10,000 residual value at the end of its service life. Its service life is estimated at 9 years; its total working hours are estimated at 45,000 and its total production is estimated at 500,000 units. During 2019, the machine was operated 6,000 hours and produced 55,000 units. During 2020, the machine was operated 5,500 hours and produced 48,000 units. Instructions Compute depreciation expense on the machine for the ear ending December 31, 2019, and the year ending December 31, 2020, using the following methods. (a) Straight-line. (b) Units-of-output (c) Working hours (d) Sum-of-the-years'-digits. (e) Declining-balance (twice the straight-line rate)