Last month when Holiday Creations, Inc., sold 35,000 units, total sales were $287,000, total variable expenses were $209,510, and fixed expenses were $36,500. 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 $2,400? (Do not round intermediate calculations.) 1 Contribution margin ratio 2 Estimated ch ange in net operating income