Spring Company'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, Winters Company, 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 per 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