Contribution Margin Review the contribution margin income statements for Cover-to-Cover Company and Biblio Files Company on their respective Income Statements. Complete the following table from the data provided on the income statements. Each company sold 78,800 units during the year. Cover-to-Cover Company Biblio Files Company Contribution margin ratio (percent) Unit contribution margin Break-even sales (units) Break-even sales (dollars) Cover-to-Cover Company Contribution Margin Income Statement For the Year Ended December 31, 2048 $394,000 Sales Variable costs: Manufacturing expense Selling expense Administrative expense $236,400 19,700 59,100 (315,200) Contribution margin $78,800 Fixed costs: Manufacturing expense Selling expense $5,000 4,000 10,700 Administrative expense (19,700) $59,100 Operating income Income Statement - Biblio Files Biblio Files Company Contribution Margin Income Statement For the Year Ended December 31, 2018 Sales $394,000 Variable costs: Manufacturing expense Selling expense Administrative expense Contribution margin $157,600 15,760 63,040 (236,400) $157,600 $80,500 Fixed costs: Manufacturing expense Selling expense Administrative expense 8,000 10,000 (98,500) Operating income $59,100