Problem 6-25 (Algo) Identify depreciation methods used LO 3 Grove Co. acquired a production machine on January 1, 2019, at a cost of $495,000. The machine is expected to have a four-year useful life,...

Grove Co. acquired a production machine on January 1, 2019, at a cost of $495,000. The machine is expected to have a four-year useful life, with a salvage value of $86,000. The machine is capable of producing 56,000 units of product in its lifetime. Actual production was as follows: 12,320 units in 2019; 17,920 units in 2020; 15,680 units in 2021; 10,080 units in 2022.

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–c):

Required:

Identify the depreciation method used for each of the following comparative balance sheet presentations (items
a–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, 2019, is the end of the first year.)