Buckingham Ltd. purchased a delivery truck on May 1, 2021. at a cost of $80,000. The truck is expected to have a residual value of $8,000 at the end of its 4-year useful life. Buckingham has a December 31 year end. Buckingham records depreciation to the nearest month. Calculate the depreciation expense using the straight-line method for 2021 and 2022. (Round answers to O decimal places, e.g 5,275) 2021 $ Depreciation expense 12000 2022 $ 18000