Problem 9-3A Alternative depreciation methods-straight-line, double-declining-balance, and units-of-production LO2 CHECK FIGURES: b. 2023=$7,000;c,2023=$37,940 On lanuary 2, 2021. Country Lumber installed a computerized machine in its factory at a cost of $168,000. The machine's useful life was estimated at four years or a total of 190,000 units with a $35,000 trade-in value. Country Lumber's year-end is December 31. Calculate depreciation for each year of the machine's estimated useful life under each of the following methods: a. Straight-line b. Double-declining-balance c. Units-of-production, assuming actual units produced were: \begin{tabular}{|c|c|c|c|} \hline Year & Straight-Line & Doblele-DecliaingBalance & Vals-ofProdaction \\ \hline 2021 & & & \\ \hline 2022 & & & \\ \hline 2023 & & & \\ \hline 2024 & & & \\ \hline Total & & & \\ \hline \end{tabular} Explanations b. b