Current Attempt in Progress Sandhill Ltd. purchased a new machine on April 4, 2017 at a cost of $156,000. The company estimated that the machine would have a residual value of $18,000. The machine is expected to be used for 10,000 working hours during its four-year life. Actual machine usage was 1.500 hours in 2017. 2.100 hours in 2018;2,300 hours in 2019, 2.200 hours in 2020, and 1,900 hours in 2021. Sandhill has a December 31 year end. (a) Your answer is partially correct Calculate depreciation for the machine under each of the following methods: (Round expense per unit to 2 decimal places, eg. 2.75 and final answers to decimal places, s. 5.275.) (1) Straight line for 2017 through to 2021. 2017 expense 25875 2018 expeme 34500 2019 expense 5 34500 2020 expense $ 2021 expense 12) Diminishing-balance using double the straight line rate for 2017 through to 2021. 2017 expense 97500 2018 expense $ 48750 2019 expense $ 24375 2020 expense $ 2019 expense 34500 2020 expense $ 34500 2021 expense $ 8625 12) Diminishing-balance using double the straight-line rate for 2017 through to 2021. 2017 expense $ 97500 2018 expense $ 48750 2019 expense $ 24375 2020 expense $ 2021 expense $ (3) Units-of-production for 2017 through to 2021. 2017 expense $ 2018 expense $ 2019 expense $ 2020 expense $ 2021 expense $ e Textbook and Media