Bramble Taxi Service uses the units-of-activity method in computing depreciation on its taxicabs. Each cab is expected to be driven 146,000 miles. Taxi 10 cost $33,000 and is expected to have a salvage value of $880. Taxi 10 was driven 29,000 miles in 2021 and 18,500 miles in 2022. (a1) Your answer is incorrect. Calculate depreciable cost per mile using unit-of-activity method. (Round answer to 2 decimal places, e.g. 0.50.) Depreciable cost $ per mile