
Answer:
Depreciation expense for 2020 = $8,418 Â
Depreciation expense for 2021 Â = $11,346
Explanation:
Depreciation expense using the units-of-production method is determined as follows :
Depreciation expense  = Depreciation rate x annual usage
where,
Depreciation rate = (Cost - Salvage Value) ÷ Estimated usage
               = ($61,000 - $2,440) ÷ 195,200 miles
               = $0.30 per mile
thus,
Depreciation expense for 2020
Depreciation expense  = $0.30 per mile x 28,060 miles
                    = $8,418          Â
Depreciation expense for 2021
Depreciation expense  = $0.30 per mile x 37,820 miles
                    = $11,346