7-8: 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. I think that companies use normal or standard costing because that is the easiest, and most common methods used for businesses. 8-4: What is the distinction between equivalent units under the FIFO method and equivalent units under the weighted-average method? the difference is that one method has the ability to do things more accurately then the other. Can some one help