Sheridan Company purchased a delivery truck for $30,000 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 12,500 in 2022 and 13,900 in 2023. (a1) Calculate depreciable cost per mile under units-of-activity method. (Round onswer to 2 decimol places, eg, 0.50.) Depreciablecost per mile