Answer:
Estimated Over head applied = ($112500 / $125000) *100 = 90% of Direct labor cost.
Thus, Actual Over Head applied = 90% of $120000 = $108000
Moreover, Actual Over Head incurred = $107400
Therefore, Overhead Over-applied is to be applied as the Actual Overhead applied is higher than the Actual Overhead Incurred
Overhead Over-applied = $108000 - $107400
Overhead Over-applied = $600
The entry to close the over-applied overhead at year-end would include:
i. Over-head A/c will be debited for $600
ii. Cost of goods sold will to be credited for $600