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 decimal places, eg. 15%. Round final answers to decimal places, eg. 2,125.) Depreciation Expense 2020 2021 3,862.5 $ 3,8625 A (1) Straight-line method $ 4,830 $ 3,510 (2) Units-of-activity method $ 5.440 $ 4,569.6 (3) Declining-balance method Marigold Company purchased a delivery truck for $34,000 on January 1, 2020. The truck has an expected salvage value of $3.100 and is expected to be driven 103,000 miles over its estimated useful life of 8 years. Actual miles driven were 16,100 in 2020 and 11.700 in 2021. (a1) Your answer is correct Calculate depreciation expense per mile under units-of-activity method. (Round answer to 2 decimal places, eg. 0.50) 03 per mile Depreciation expense