George Company bought a tractor for $250,000 on April 1, 2020. The company estimates a salvage value of $50,000 at the end of its 8-year lifespan and estimates the tractor will run for 10,000 over that time span.

Calculate depreciation expense for 2020 and 2021 using:

- Straight - Line method

-Double declining balance method

- Units of Production if the labor hours were 900 in 2020 and 2000 in 2021.

b. If George company using the straight-line depreciation method what would the deprecation expense be for 2022 if at the end of the 2021 its useful line span decreases to 7 years and has no salvage value?