Why do companies use predetermined overhead rates rather than actual manufacturing overhaed costs to apply overhead to job?

to avoid delaying the product costing exercise.

Explanation:

The actual overhead costs are usually not readily available when costing a product. Waiting for the actual costs would delay the product costing exercise, thus a company uses estimates (predetermined overhead rates) and later adjust for the over or under - application when actual information is available.

answer; intensive use of a sales force and is relatively costly;

um sure