Bridgeport Company purchased a delivery truck for 27,000 on January 1,2020. The truck has an expected salvage value 1,500, and is expected to be driven 102,000 miles over its estimated useful life of 10 years. Actual miles driven were 12,800 in 2020 and 14,300 in 2021

Compute depreciation expense for 2020 and 2021 using the straight-line method, the units-of-activity method, and the double-declining-balance method