Exercise 6-4 Computing and using the CM Ratio (L06-3) Last month when Holiday Creations, Inc., sold 39,000 units, total sales were $310,000 total variable expenses were $226,300, and fixed expenses were $36,300 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 increuse total sales by $2,900? (Do not round Intermediate calculations.) 1. Contribution margin ratio 2. Estimated change in net operating income