service life is expected to be $10,000. The company expects the equipment to operate for 10,000 hours. The equipment operated purchased equipment for $64,000. Residual value at the end of an estimated four-ye 3,900 and 4,700 hours in 2021 and 2022, respectively, Required: a. Calculate depreciation expense for 2021 and 2022 using straight-line method. b. Calculate depreciation expense for 2021 and 2022 using double declining balance method. c. Calculate depreciation expense for 2021 and 2022 using units-of-production using hours operated. Complete this question by entering your answers in the tabs below. Required A Required B Required Calculate depreciation expense for 2021 and 2022 using straight-line method. Straight-Line Depreciation Annual Depreciation Expenso Choose Numerator 1 Choose Denominator: Formula Depreciation Expense Cost minus Residual Estimated Useful Life (years) Amounts Depreciation Expense 2021