Can someone help me determine the correct response to this question?

Mighty Muffler, Inc. operates an automobile service facility that specializes in replacing mufflers on compact cars. The following table shows the costs incurred during a month when 500 mufflers were replaced. (Round "cost per muffler" to 2 decimal places.) Number of Muffler Replacements 400 500 600 Total costs: Fixed costs $ 49,000 Variable costs 29,000 78,000 Total costs $ Cost per muffler replacement: Fixed cost Variable cost Total cost per muffler replacement