The depreciation expense for 2021 using the double declining balance method is $40,000 (first option).
Depreciation is the method that is used to expense the cost of an asset. Depreciation is when the value of an asset declines as a result of wear and tear.
The double-declining-balance method of depreciation is a depreciation method where the depreciation expense is twice its value would have been under the straight line depreciation method.
Depreciation expense using the double declining method = Depreciation factor x cost of the asset
Depreciation factor = 2 x (1/useful life)
Depreciation expense using the double declining method = (2/8) x $160,000 = $40,000.
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