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Exercise 6-4 (Algo) Computing and Using the CM Ratio [LO6-3] Last month when Holiday Creations, Incorporated, sold 36,000 units, total salos were $144,000, total variable expenses were $115,200, and fixed expenses were $37,400. 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 475 units and total soles by $1,900 ? (Do not round Intermediate calculations.)