Echo Corporation uses a job-order costing system and applies overhead to jobs using a predetermined overhead rate. During the year the company's Finished Goods inventory account was debited for $360,000 and credited for $338,800. The ending balance in the Finished Goods inventory account was $36,600. At the end of the year, manufacturing overhead was overapplied by $15,900. The balance in the Finished Goods inventory account at the beginning of the year was: $15,900 $15,400 $21,200 $36,600