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.

Bus Acquired Cost SalvageValue Useful Lifein Years Depreciation Method

1 1/1/15 $97,000 $8,000 5 Straight-line

2 1/1/15 127,000 11,500 5 Declining-balance

3 1/1/16 94,100 8,000 4 Units-of-activity

For the declining-balance method, the company uses the double-declining rate. For the units-of-activity method, total miles are expected to be123,000. Actual miles of use in the first 3 years were 2016,27,500; 2017,33,000; and 2018,29,000.

For Bus #3, calculate depreciation expense per mile under units-of-activity method. (Round answer to 2 decimal places, e.g. 0.50.)

Depreciation expense$ _________ per mile