Contribution Margin Shaded cells have feedback. Shaded cells have feedback Review the contribution margin income statements for Cover-to-Cover Company and Biblio Files Company on their respective Income Statements panels. Complete the following table from the data provided in the income statements. Each company sold 84,800 units during the year. Contribution margin ratio (percent) Unit contribution margin Break-even sales (units) Break-even sales (dollars) Cover-to-Cover Company Biblio Files Company Points: 0/8