Last month when Holiday Creations, Incorporated, sold 38.000 units, total sales were $152,000, total variable expenses were $123.120. and fixed expenses were $37.900. 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 sales volume by 400 units and total sales by $1,600? (Do not round Intermediate calculations.) 96 1. Contribution margin ratio 2. Estimated change in net operating income