A machine that cost $980,000 was purchased on April 1,2025 . Its estimated salvage value is $98,000 and its expected useful life is eight years. (a1) Calculate the depreciation expense by straight-line for 2025 . (Round answer to 0 decimal places, e.g. 5,275.) Depreciation expense $ Calculate the depreciation expense by double-declining balance for 2026 . (Round answer to 0 decimal places, e.g. 5,275.) Depreciation expense \$ Calculate the depreciation expense by sum-of-the-years'-digits for 2026. (Round answer to 0 decimal places, e.g. 5,275.) Depreciation expense $