Answer:
$11,200
Step-by-step explanation:
The computation of the depreciation expense using the units of activity method is shown below:
Before that first we have to find out the depreciation rate which is
= (Original cost - residual value) ÷ (estimated machine hours)
= ($140,000- $28,000) ÷ (40,000 hours)
= ($112,000) ÷ (40,000 hours)
= $2.8
Now for the depreciation expense is
= Machine hours × depreciation per machine hours
= 4,000 × $2.8
= $11,200