Mighty Muffler, Inc. operates an automobile service facility that speciall cars. The following table shows the costs incurred during a month whe (Round "cost per muffler" to 2 decimal places.) 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 900 mufflers were replaced. (Round "cost per muffler" to 2 decimal places.) Number of Muffler Replacements 300 000 000 Total costs: $ 73,800 37 800 Fixed costs Variable costs Total costs Cost per muffler replacement Fixed cost $ 111.000 Variable cost Total cost per muffler replacement