I don't understand this one

2 0 Schulz Corporation applies overhead based upon machine-hours. Budgeted factory overhead was $266,400 and budgeted machine-hours were 18,500. Actual factory overhead was $287,920 and actual machine-hours were 19,050. Before disposition of under/overapplied overhead, the cost of goods sold was $560,000 and ending inventories were as follows: Direct materials WIP Finished goods S 60,000 190,000 250,000 $500,000 Total Required: . Determine the budgeted factory overhead rate per machine-hour. . Compute the over/underapplied overhead. Prepare the journal entry to dispose of the variance using the proration approach