The Greenback Store's cost structure is dominated by variable costs with a contribution margin ratio of 0.30 and fixed costs of $38,500. 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 $258,500. Every dollar of sales contributes 70 cents toward fixed costs and profit. Both companies have sales of $550,000 for the month. Required: a. Compare the two companies'cost structures GREENBACK STORE ONE-MART Amount Percentage Amount Sales Variable cost Contribution margin Fixed costs Operating profit b. Suppose that both companies experience a 20 percent increase in sales volume. By how much would each company's profits increase? Greenback Store's profits increase by One-Mart's profits increase b