On March 31, 2021, Canseco Plumbing Fixtures purchased equipment for $46,000. Residual value at the end of an estimated four-year service life is expected to be $4,000. The company expects the equipment to operate for 12,000 hours. The equipment operated for 3,000 and 3,800 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 C Calculate depreciation expense for 2021 and 2022 using straight-line method. Straight-Line Depreciation Choose Numerator: Choose Denominator: Annual Depreciation Formula Cost minus Residual Estimated Useful Life (years) =Annual Depreciation Amounts = Year Annual Depreciation Fraction of Year = Depreciation Expense 2021 $ 0 = 2022 $ 0 x < Required A Required B >