can you please explain calculations for accumulated depfeciation and book value need to understand where i am going wrong

Blossom Bus Lines uses the units-of-activity method in depreciating its buses. One bus was purchased on January 1,2022, at a cost of $117,000. Over its 4 -year useful life, the bus is expected to be driven 210,000 miles. Salvage value is expected to be $7,800. K and Media Prepare a depreciation schedule assuming actual mileage was:2022,46,800;2023,60,000:2024, 47,000; and 2025, 56,200. (Round depreciation cost per unit to 3 decimal places, e.8.0.125 and other answers to 0 decimal places, es. 125)