The cost of equipment purchased by Blue, Inc., on June 1, 2020, is 598,700. It is estimated that the machine will have a $6.300 salvage value at the end of its service life. Its service life is estimated at 7 years, its total working hours are estimated at 46,200, and its total production is estimated at 577,500 units. During 2020, the machine was operated 7,380 hours and produced 67,650 units. During 2021, the machine was operated 6,765 hours and produced 59,000 units Compute depreciation expenso on the machine for the year ending December 31, 2020, and the year ending December 31, 2021 using the following methods. (Round depreciation per unit to 2 decimal places, e.g. 15.25 and final answers to o decimal places, e.g. 45,892.) 2020 2021 a) Straight-line S $ (b) Units of output S S ic Working hours $ $ S $ Sum-of-the-years-digits Double declining balance wice the straight rate fe) $