Last month when Holiday Creations. Incorporated, sold 40,000 units, total sales were $160,000, total variable expenses were $116,800, and fixed expenses were $38,200. 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 67'5 units and total sales by $2,700? [Do not round intermediate calculations.) 1. Contribution margin ratio -. 2. Estimated change in net operating income