In order to calculate the depreciation using the double declining balance method you must first calculate the amount of depreciate using the straight line method. After you calculate it by the straight line method, you simply need to double it for this this problem.
The original price is $20,000, and then subtract the $2,000 estimated trade in value and the answer is $18,000. This is the amount that you need to depreciate.
Straight line method: $18,000 divided by the 5 year useful life = $3,600 per year.
Double declining balance = $3,600 x2 = $7,200 per year depreciation.
Year Depreciation Amount
1 7,200
2 7,200
3. 3,600
