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 600 mufflers were replaced. (Round "cost per muffler" to 2 decimal places.) Number of Muffler Replacements 500 600 700 Total costs: Fixed costs $ Variable costs 59,400 35,400 94,800 Total costs $ Cost per muffler replacement: Fixed cost Variable cost Total cost per muffler replacement