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.) Required: Fill in the missing amounts. Muffler Replacements 500 600 700 $ 50,400 26,400 76,800 $ Total costs Fixed costs Variable costs Total costs Cost per muffler replacement Fixed cost Variable cost Total cost per muffler replacement