Compute depreciation expense for 2020 and 2021 using (1) the straight-line method, (2) the units-of-activity method, and (3) the double-declining-balance method. (Round depreciation cost per unit to 2 decimal places, eg. 0.50 and depreciation rate to 0 decimal places, eg. 15\%. Round final answers to O decimal places, eg. 2, 125.) Swifty Corporation purchased a delivery truck for $28.000 on January 1,2020. The truck has an expected salvage value of $2000. and is expected to be driven 100,000 miles over its estimated useful life of 8 years. Actual miles driven were 14.500 in 2020 and 11.000 in 2021 (a1) Your answer is correct Calculate depreciation expense per mile under units-ot-activity method. (Round answer to 2 decimal places eg a.50) Depreciation expense $ perinile