Northwood Company manufactures basketballs. The company has a ball that sells for $30. At present, the ball is manufactured in a small plant that relies heavily on direct labor workers. Thus, variable expenses are high, totaling $18.00 per ball, of which 60% is direct labor cost. Last year, the company sold 51,000 of these balls, with the following results: Sales (51,000 balls) Variable expenses $1,530,000 918,000 Contribution margin Fixed expenses 612,000 492,000 Net operating income $ 120,000 Required: 1-a. Compute last year's CM ratio and the break-even point in balls. (Do not round intermediate calculations. Round up your final break even answers to the nearest whole number.) CM Ratio Unit sales to break even balls 1-b. Compute the the degree of operating leverage at last year's sales level. (Round your answer to 2 decimal places.) Degree of operating everage