defi ned? What are the diff erences among the formula, graph, and income statement approaches for computing breakeven? 3. What is the contribution margin ratio? How is it used to calculate the break-even point? 4. Why is CVP analysis generally used as a short-run tool? Would CVP ever be appropriate as a long-run model? 5. How is the “bag” assumption used in CVP analysis for a multiproduct fi rm? What additional assumption must be made in multiproduct CVP analysis that doesn’t pertain to a single-product CVP situation? 6. A multiproduct company has a sales mix of nine widgees to three squigees. Widgees have a contribution margin ratio of 45 percent, and squigees have a contribution margin ratio of