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 700 mufflers were replaced. (Round "cost per muffler" to 2 decimal places.) Required: Fill in the missing amounts. Muffler Replacements 600 700 800 Total costs: Fixed costs $ 70,000 42,000 112,000 $ Variable costs Total costs Cost per muffler replacement: Fixed cost Variable cost Total cost per muffler replacement