Swifty Taxi Service uses the units-of-activity method in computing depreciation on its taxicabs. Each cab is expected to be driven 142,000 miles. Taxi no. 10 cost $49,360 and is expected to have a salvage value of $2,500. Taxi no, 10 was driven 35,500 miles in 2022 and 25,000 miles in 2023. (21) Calculate depreciation cost per mile using unit-of-activity method. (Round answer to 2 decimal places, eg. 0.50.) Depreciation cost $ per mile