Last month when Holiday Creations, Inc., sold 40,000 units, total sales were $308,000, total variable expenses were $237,160, 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 $2,100 Estimated change in net operating income