A machine cost $1,472,000 on April 1, 2020. Its estimated salvage value is $90,000 and its expected life is 4 years. Calculate the depreciation expense by straight-line for 2020. (Round answer to 0 decimal places, eg. 5,275.) Depreciation expense $ Question Part Score Calculate the depreciation expense by double-declining balance for 2021. (Round answer to 0 decimal places, e.g. 5,275.) Depreciation expense $ Question Part Score Calculate the depreciation expense by sum-of-the-years'-digits for 2021. (Round answer to 0 decimal places, eg. 5,275.) Depreciation expense $