Selected data about ABC Manufacturing Ltd. operations follows: Actual manufacturing overhead cost Estimated manufacturing overhead cost Estimated direct labour cost Estimated direct labour hours Actual direct labour hours Estimated machine hours Actual machine hours $400,000 $420,000 $180,000 70,000 55,000 80,000 84,000 By how much was manufacturing overhead overallocated or underallocated for the year if ABC Manufacturing Ltd. uses a predetermined manufacturing overhead rate based on direct labour hours? $20,000 overallocated $70,000 overallocated $70,000 underallocated $20,000 underallocated