Answer:
$30,000 under applied
Explanation:
For computing the over applied or under applied, first, we have to compute the predetermined overhead rate. The formula is shown below:
Predetermined overhead rate = (Total estimated manufacturing overhead) ÷ (estimated machine hours)
= $1,200,000 ÷ 300,000 hours
= $4
Now we have to find the applied overhead which equal to
= Actual machine hours × predetermined overhead rate
= 280,000 × $4
= $1,120,000
So, the ending overhead equals to
= Actual manufacturing overhead - applied overhead
= $1,150,000 - $1,120,000
= $30,000 under applied