Current Attempt in Progress Swifty Company purchased machinery on January 1, 2020, for $82,400. The machinery is estimated to have a salvage value of $8,240 after a useful life of 8 years. (a) Compute 2020 depreciation expense using the double-declining-balance method. Depreciation expense $ $ e Textbook and Media Save for Later Attempts: 0 of 3 used Submit