Last month when Holiday Creations, Incorporated, sold 42000 units, total sales were $168,000, total variable expenses were $129,360, and fixed expenses were $35,700 Required: 1. What is the company's contribution margin (CM) rato? 2 What is the estimated change in the company's net operating Income if I can increase sales volume by 675 unts and total sales by $2700? (Do not round Intermediate calculations.) % 1. Contribution margin ratio 2. Estimated change in net operating income 1