double declining balance used

On January 1, 2021, Morrow inc, purchased a spooler at a cost of $40,000. The equipment is expected to last eight years and have a residual value of $4,000. During its eight-year life, the equipment is expected to produce 250,000 units of product in 2021 and 2022 42,000 and 76,000 units, respectively. were produced. Required: Compute depreciation for 2021 and 2022 and the book value of the spooler at December 31, 2021 and December 31, 2022, assuming the double-declining balance method is used 2021 2022 Depreciation Book value