I don't understand part (A2)

Problem 9-2A (Part Level Submission) In recent years, Cullumber Transportation purchased three used buses. Because of frequent turnover in the accounting department, a different accountant selected the depreciation method for each bus, and various methods were selected. Information concerning the buses is shown as follows. Useful Life in Years Bus + Acquired 1/1/17 1/1/17 1/1/18 Cost $ 95,000 110,000 73,500 Salvage Value $ 5,000 10,000 7,500 Depreciation Method Straight-line Declining-balance Units-of-activity 2 + + For the declining-balance method, the company uses the double-declining rate. For the units-of-activity method, total miles are expected to be 110,000. Actual miles of use in the first 3 years were 2018, 23,000; 2019, 31,000; and 2020, 29,000. (al) Your answer is correct. For Bus #3, calculate depreciable cost per mile under units-of-activity method. (Round answer to 2 decimal places, e.g. 0.50.) Depreciable cost T 0.6 per mile Click if you would like to Show Work for this question: Open blank Show Work Copy Show Work from Previous attempt SHOW SOLUTION SHOW ANSWER LINK TO TEXT VIDEO: SIMILAR PROBLEM Attempts: 1 of 3 used (a2) Compute the amount of accumulated depreciation on each bus at December 31, 2019. (Round depreciable cost per unit to 2 decimal places, e.g. 0.50 and depreciation rate to o decimal places, e.g. 15%. Round final answers to 0 decimal places, e.g. 2,125.) Accumulated depreciation BUS 1 BUS 2 BUS 3