RST Company produces a product that has a selling price of $10 per unit and variable cost of $6 per unit. The company's fixed costs are $30,000. If the company sells 15,000 units, the degree of operating leverage is?

RST Company produces a product that has a selling price of $10 per unit and variable cost of $6 per unit. The company's fixed costs are $30,000. If the company sells 15,000 units, the degree of operating leverage is