(a2) 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, e.g. 0.50 and depreciation rate to O decimal places, e.g. 15%. Round final answers to 0 decimal places, e.g. 2,125.) Depreciation Expense 2020 2021 (1) Straight-line method $ $ (2) Units-of-activity method $ $ (3) Declining-balance method $ $ Save for Later 20 tv Attempts: 0 of 1 used Submit Answer VIEW FORICIES Current Attempt in Progress Concord Company purchased a delivery truck for $29,000 on January 1, 2020. The truck has an expected salvage value of $1,000, and is expected to be driven 100,000 miles over its estimated useful life of 10 years. Actual miles driven were 12,300 in 2020 and 13,200 in 2021