Calculating Units-of-Production Depreciation Swift Trucking Company purchased a long-haul tractor-trailer for $400,000 at the beginning of the year. The expected useful life of the tractor-trailer rig was 11 years or 500,000 miles. Salvage value was estimated to be $60,000. During the first 5 years of use, the rig logged the following usage in miles: Year 1 80,000 miles Year 2 75,000 miles Year 3 80,000 miles Year 4 76,000 miles Year 5 60,000 miles Total 371,000 miles Calculate the depreciation expense to be taken on the tractor-trailer for each year using: (a) Units-of-production method Round your answer to the nearest whole number. Depr exp Year 1 $ 2. $ 3 $ x x x x x x 4 $ 5 $ Total $ E Round your answer to the nearest whole number. Year Depr exp x 1 $ 2 $ X 3 $ X 4 $ X X 5 $ Total $ X (b) Straight-line method Round your answer to the nearest whole number. Depr exp Year 1 $ x 2. $ x 3 $ X 4 $ X 5 $ X Total $ X Which method gives you higher total depreciation charges over the five-year period? Units-of-production method - Check