Need help with a step-by-step explanation/solution

1. For bus #3 calculate depreciation expense per mile under the units-of-activity method (round answer to 2 decimal places)

Compute the amount of accumulated depreciation on each bus at December 31, 2022.

Bus 1= $

Bus 2= $

Bus 3= $

3. If bus 2 was purchased on April 1 instead of January 1, what is the depreciation expense for this bus in (1) 2020 and (2) 2021

Thank you!

In recent years, Martinez Transportation purchased three used buses. Because of frequent turnover in the accounting department, a different accountant was in charge of selecting the depreciation method for each bus, and various methods have been used. Information concerning the buses is summarized in the table below. For the declining-balance method, the company uses the double-declining rate. For the units-of-activity method, total miles are expected to be 117,000 . Actual miles of use in the first 3 years were 2021,27,500;2022,35,000; and 2023, 31,500