company. Merchant Company uses a predetermined overhead rate based on direct labor hours to apply manufacturing overhead to jobs. On September 1, the estimates for the month were: Manufacturing overhead: $17,000 Direct labor hours: 13,600 During September, the actual results were Manufacturing overhead: $18,500 Direct labor hours: 12,000 Overapplied manufacturing overhead of $1,500 Underapplied manufacturing overhead of $1,500 Underapplied manufacturing overhead of $3,500 Overapplied manufacturing overhead of $3,500