Tannenbaum Corporation purchased a truck on March 25,2023 for $90,000. The truck is estimated to have a salvage value of $3,600 and a usefil life of 120,000 miles and five years. It was driven 18,000 miles in 2023 and 32,000 miles in 2024 . Tannenbaum uses the units of activity method to calculate depreciation. Compute depreciation expense for 2023 and 2024