Last month when Oriental Creations, Incorporated, sold 38,000 units, total sales were $152,000, total variable expenses were $126,160, and fixed expenses were $37,800. Required: What is the estimated increase in the company's net operating income if it can increase total sales by $1,500 ? Note: Do not round intermediate calculations. The company's contribution margin ratio is closest to: Multiple Choice 74.9% 80.5% 30.0%