I need assistance with that wrong answer in the 6th box. I require a clear explanation of what numbers to plug into the calculator and where numbers come from.

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