Lin Corporation uses a job order costing system and normal costing, with overhead being applied on the basis of direct labor cost. There were no jobs in process at the start of the period. During the month, the company worked on 3 jobs, with the following information:

Job Alpha Beta Gamma Direct Labor ($8/hour) $ 24,000 $ 8,800 Direct Materials $ 42,000 $ 61,000 Overhead Applied $ 23,940 $ 6,160

During the month, only job Alpha was completed and transferred to finished goods inventroy. The ending balance in the work in process account is $148,650. The overhead control account had debit entries totalling $48,640 for the period.

1) What is the predetermined overhead allocation rate?

2) Compute the amount of overapplied or underapplied overhead for the period. Indicate both the amount and direction.

3) Compute the cost of direct materials issued to production for the month.

4) In three sentences or fewer, what is job order costing?