Pina Colada Corp. purchased a delivery truck for $38,000 on January 1,2022 . The truck has an expected salvage value of $7,000, and is expected to be driven 100,000 miles over its estimated useful life of 8 years. Actual miles driven were 12,400 in 2022 and 14,900 in 2023. (a1) Calculate depreciable cost per mile under units-of-activity method. (Round answer to 2 decimal places, e.g. 0.50. ) Depreciable cost $ per mile