Exercise 5-4 Computing and Using the CM Ratio [LO5-3 Last month when Holiday Creations, Inc., sold 39,000 units, total sales were $296,000, total variable expenses were $236,800, an fixed expenses were $39,200 Required 1. What is the company's contribution margin (CM) ratio? 2. What is the estimated change in the company's net operating income if it can increase total sales by $1,900? (Do not round intermediate calculations.) margin ratic 2 Estimated change in net operating income