The Greenback Store's cost structure is dominated by variable costs with a contribution margin ratio of 0.30 and fixed costs of $57200. Every dollar of sales contributes 30 cents toward fixed costs and profit. The cost structure of a competitor, One-Mart, is dominated by fixed costs with a higher contribution margin ratio of 0.70 and fixed costs of $233,200. Every dollar of sales contribut 70 cents toward fixed costs and profit. Both companies have sales of $440,000 for the month. Required: a. Compare the two companies' cost structures. b. Suppose that both companies experience a 20 percent increase in sales volume. By how much would each company's profits increase? increase? Complete this question by entering your answers in the tabs below. Required A Required B Compare the two companies' cost structures GREENBACK STORE Amount Percentage ONE-MART Amount Percentage Variable cost Contribution margin Fixed costs Operating profit L Required B >