Answer:
$2,000
Explanation:
1. straight-line method
depreciation expense = $3,000 and $3,000
accumulated depreciation = $6,000
book value $30,000
2. double-declining-balance method
depreciation expense $7,200 and $5,760
accumulated depreciation = $12,960
book value = $23,040
3. units-of-production method is used.
depreciation expense $1,500 and $5,040
accumulated depreciation = $6,540
book value = $29,460