Depreciation by units-of-activity Method Prior to adjustment at the end of the year, the balance in Trucks is $411,700 and the balance in Accumulated Depreciation-Trucks is $125,740. Details of the subsidiary ledger are as follows: Estimated Residual Value Accumulated Depreciation at Beginning of Year Estimated Useful Life Truck Miles Operated During Year No. Cost 1 $86,000 $12,900 210,000 miles 31,500 miles 2 117,200 14,064 250,000 25,000 20,100 3 101,000 14,140 12,900 $23,440 $80,800 $21,500 201,000 330,000 4 107,500 39,600 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 (in cents) Miles Operated Credit to Accumulated Depreciation Truck No. 1 $ 31,500 $ 2 $ 25,000 $ 3 $ 20,100 $ 4 $1 39,600 $ Total b. Journalize the entry to record depreciation year