Problem 10-02A a1-b In recent years, Swifty Transportation purchased three used buses. Because of frequent tunover 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. Salvage Value Useful Life in Years Bus Acquired Cost 96,600 5500 Method Straight-ine 2 1/1/18130,000 10,000SDedining-balance 8,000 89,900 Units-of-activity For the declining-balance method, the company uses the double-declining rate. For the units-of-activity mathod, total miles are expected to be 117,000. Actual miles of use In the first 3 years were 2019, 25,500; 2020, 35,500; and 2021, 29,000. For Bus 3, calculate depreclation expense per mle under units-of-activity method. (Round answer to 2 decimal places, e.g. 0.50.) Depreciation expense s per mile