Robinson prorates under allocated or over allocated amounts on the basis of the total amount of manufacturing overhead allocated in 2013 (before proration) in the ending balances of Work-in-Process Control, Finished Goods Control, and Cost of Goods Sold accounts. The $135,000 under allocated overhead is prorated over the three accounts in proportion to the total amount of manufacturing overhead allocated (before proration) in column 2 of the following table, resulting in the ending balances (after proration) in column 5 at actual costs