Todrick Company is a merchandiser that reported the following information based on 1,000 units sold: $ $ $ $ 270,000 18,000 180,000 9,000 Sales Beginning merchandise inventory Purchases Ending merchandise inventory Fixed selling expense Fixed administrative expense Variable selling expense Variable administrative expense Contribution margin Net operating income $ $ 10,800 13,500 $ 54,000 16,200 Required: 1. Prepare a contribution format income statement. 2. Prepare a traditional format income statement. 3. Calculate the selling price per unit. 4. Calculate the variable cost per unit. 5. Calculate the contribution margin per unit. 6. Which income statement format (traditional format or contribution format) would be more useful to managers in estimating how net operating income will change in responses to changes in unit sales