Windsor Taxi Service uses the units-of-activity method in computing depreciation on its taxicabs. Each cab is expected to be driven 152,000 miles. Taxi 10 cost $30,000 and is expected to have a salvage value of $1,120. Taxi 10 was driven 33,000 miles in 2021 and 21,000 miles in 2022. (a1) Calculate depreciable cost per mile using unit-of-activity method. (Round answer to 2 decimal places, es. 0.50.) Depreciable cost per mile