(Consider each case independently): 1. What would be the revised net operating income per month if the sales volume increases by 50 units? 2. What would be the revised net operating income per month if the sales volume decreases by 50 units? 3. What would be the revised net operating income per month if the sales volume is 6,700 units? Last month when Holiday Creations, Incorporated, sold 35,000 units, total sales were $140,000, total varlable expenses were $105,000, and fixed expenses were $39,700. 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 625 units and total sales $2,500 ? (Do not round Intermediate calculatlons.)