5 of 5 - 12 Cullumber Company purchased a delivery truck for $40,000 on July 1, 2022. The truck has an expected salvage value of $6,000, and is expected to be driven 100,000 miles over its estimated useful life of 8 years. Actual miles driven were 15.000 in 2022 and 12,000 in 2023. Cullumber uses the straight-line method of depreciation. (a) Compute depreciation expense for 2022 and 2023