Exercise 5-4 Computing and Using the CM Ratio (LO 5-3) Last month when Holiday Creations, Inc., sold 42,000 units, total sales were $282,000, total variable expenses were $236,880, and fixed expenses were $35,900. Required: 1. What is the company's contribution margin (CM) ratio? Contribution margin ratio 2. Estimate the change in the company's net operating income if it were to increase its total sales by $1,500. Estimated change in net operating income