Grove Company acquired a production machine on January 1, 2022, at a cost of $575,000. The machine is expected to have a four-year useful life, with a salvage value of $118,000. The machine is capable of producing 88,000 units of product in its lifetime. Actual production was as follows: 19,360 units in 2022; 28,160 units in 2023; 24,640 units in 2024; 15,840 units in 2025. Following is the comparative balance sheet presentation of the net book value of the production machine at December 31 for each year of the asset's life, using three alternative depreciation methods (items a to c): Required: Identify the depreciation method used for each of the following comparative balance sheet presentations (items a to c). If a declining-balance method is used, be sure to indicate the percentage (150 % or 200% ). (Hint: Read the balance sheet from right to left to determine how much has been depreciated each year. Remember that December 31, 2022, is the end of the first year.) Production Machine, Net of Accumulated Depreciation a. b. C Depreciation Method 2025 At December 31 2024 2023 2022 118,000 232,250 346,500 460,750 118,000 118,000 200,260 328,220 474,460 118,000 143,750 287,500