I cannot figure out the accumulated depreciation for bus 2 & bus 3. Help!

Problem 9-2A (Part Level Submission) In recent years, Avery 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 summarized as follows. 1/1/13$96,000 110,000 92,000 $6,000 10,000 8,000 Straight-line Declining-balance Units-of-activity For the declining-balance method, the company uses the double-dedining rate. For the units-of-activity method, total miles are expected to be 120,000. Actual mles of use in the first 3 years were: 2014, 24,000; 2015, 34,000; and 2016, 30,000. (a1) Your answer is correct. Calculate depreciation expense per mile under units-of-activity method. (Round answer to 2 decimal places, e.g. o.so.) Depreciation expense 0.701 per mile