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. Total costs: (" Muffler Replacements ")/(500quad600quad700) Fixed costs Variable costs Total costs Cost per muffler replacement: Fixed cost Variable cost Total cost per muffler replacement ((a)/(c))/(e)quad($42,000)/(30,000)((b)/(d))/($,72,000) ((g)/(j))/(m)((h)/(k))/((n)/(0))((1)/(1))/(0_) Required: Fill in the missing amounts, labeled (a) through (o), in the table