Linton Company purchased a delivery truck for $34,000 on January 1, 2022. The truck has an expected salvage value of $2,000, and is expected to be driven 100,000 miles over its estimated useful life of 8 years. Actual miles driven were 15,000 in 2022 and 12,000 in 2023. (a1) Calculate depreciation expense per mile under units-of-activity method. (Round answer to 2 decimal places, eg. 0.50.) Depreciation expense $ per mile