Depreciation Methods On January 1, 2021, Loeffier Company acquired a machine at a cost of 3151,000. Loeffler estimates that it will use the machine for four years or 9.000 machine-hour. It estimates that after four years the machine can be sold for $7,000. Loeffler uses the machine for 1,900 and 2,300 machine-hours in 2021 and 2022, respectively Requiredi Compute depreciation expense for 2021 and 2022 using the 1. Straight-line method of depreciation Depreciation Expense 2021 2022 2. Double declining balance method of depreciation Depreciation Expense 2021 2022 J. units of production method of depreciation Depreciation Expense 2021 2022