QUESTION: Clock Company sells a single product. The company's sales and expenses for a recent month follow: PER UNIT $40 28 $12 TOTAL Sales Less Variable Expenses Contribution Margin Less fixed expenses Net Operating Income S600,000 420,000 180,000 150,000 $30,000 Required: a) What is the monthly break-even point in units sold and in sales dollars? b) Without resorting to computations, what is the total contribution margin at the break-even point