Depreciation by Units-of-activity Method Prior to adjustment at the end of the year, the balance in Trucks is $399,000 and the balance in Accumulated Depreciation-Trucks is $117,500. Details of the subsidiary ledger are as follows: Estimated Truck Residual No. Cost Value Estimated Useful Life Accumulated Depreciation Miles Operated at Beginning During of Year Year 1 $81,500 $12,225 220,000 miles 33,000 miles 2 110,000 13,200 410,000 $22,000 41,000 3 90,000 12,600 201,000 72,000 20,100 4 117,500 14,100 370,000 23,500 44,400 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. Rate per Mile Truck No. (in cents) Miles Operated Credit to Accumulated Depreciation 1 0.31 33,000 2 0.24 V 41,000 3 0.39 20,100