Please answer all those question, faill to do so will result rate down.

1) Why do most companies use normal or standard costing? After all, actual costing gives the actual cost, so the firm could just wait until it knows what the cost will be. 2) Why is control of materials important from a managerial planning perspective? 3)Worrying about the choice of an overhead allocation base is a waste of time. In the end, all the overhead is charged to production." Do you agree? Why