Depreciation by units-of-activity method Prior to adjustment at the end of the year, the balance in Trucks is $296,900 and the balance in Accumulated Depreciation-Trucks is $99,740. Details of the subsidiary ledger are as follows: a. Determine the depreciation rates per mile and the amount to be credited to the accumulated depreciation section of each of the subsidiary accounts for the miles operated during the current year. Round the rate per mile to two decimal places. a. Determine the depreciation rates per mile and the amount to be criedited to the accumulated depreciation section of esch of the subsidiary accounts for the mles operated during the curreot yeac. Round the rate per mile to two decimal places. b. Journalize the entry on December 31 to recond depreciation for the year. If arf ampunt boxdoes not require an entry, leave it blank