Albert Tubes Co. uses a predetermined overhead rate to apply manufacturing overhead to jobs. This year, the company worked 10000 actual direct labor hours and used 10000 machine hours. The total overhead cost incurred was $61000. The company had estimated that it would work 4000 direct labor hours, and use 7000 machine hours, during the year. The allocation rate based on direct labour hours is $12 per direct labour hour and the allocation rate based on machine hours is $8 per machine hour. How much overhead was estimated?