$30,000
Explanation:
Standard allocation rate = Estimated maufacturing overheads ÷ estimated machine hours
Standard rate = $150,000 ÷ 10,000 hours = $15 per machine hour
Actual overheads incurred = $31,000
Actual machine hours = 2000 hours
Overheads are to be allocated based upon predetermined/standard absorption rate being $15 per machine hour
Manufacturing overheads to be allocated = 2000 hours × 15 per machine hour
Manufacturing overheads to be allocated = $30,000