A machine cost $1,156,000 on April 1, 2020. Its estimated salvage value is $138,000 and its expected life is 4 years.

Calculate the depreciation expense by straight-line for 2020 (Round answer to 0 decimal places, e.g. 5,275.)

Calculate the depreciation expense by double-declining

Calculate the depreciation expense by sum-of-the-years'-digits