Exercise 5-4 Computing and Using the CM Ratio [LO5-3] Last month when Holiday Creations, Inc., sold 36,000 units, total sales were $317,000, total variable expenses were $263,110, and expenses were $38,900 1. What is the company's contribution margin (CM) ratio? s the estimated change in the company's net operating income if it can increase total sales by $1,900? (Do not round