Depreciation by units-of-activity Method Prior to adjustment at the end of the year, the balance in Trucks is $420,700 and the balance in Accumulated Depreciation-Trucks is $125,440. Details of the subsidiary ledger are as follows: Accumulated Truck Estimated Residual Estimated Depreciation Miles Operated No. Cost Value Useful Life at Beginning During of Year Year 1 $86,000 $12,900 200,000 miles 30,000 miles 2 117,200 14,064 400,000 $23,440 40,000 3 97,500 13,650 204,000 $78,000 20,400 4 120,000 14,400 380,000 $24,000 45,600 a. Determine for each truck the depreciation rate per mile and the amount to be credited to the accumulated depreciation section of each subsidiary account for the miles operated during the current year. Keep in mind that the depreciation taken cannot reduce the book value of the truck below its residual value. Round the rate per mile to two decimal places. Enter all values as positive amounts. Rate per Mile Miles Credit to Accumulated Truck No. (in cents) Operated Depreciation 1 2 30,000 40,000 3 20,400 45,600 Total b. Journalize the entry to record depreciation for the year.