show evidence , income statement

The July contribution format income statement of Rockford Corporation appears below: Sales Variable expenses Contribution margin Fixed expenses Net operating income $510,600 255,300 255,300 217300 $ 38,000 20 1. The degree of operating leverage is closest to: A. 6.72 B. 13.44 C. 0.15 D. 0.07 2. If the company's sales increase by 5%, its net operating income should increase by about A 34% B, 67% C. 5% D. 7% College Corporation has provided the following data concering its only product Selling price Current sales Break-even sales $150 per unit 39 900 units 31,521 units 3 What is the margin of safety in dollars? A $1.256,850 B. $4,728.150 C. $3,990,000 D. $6,985.000 20 The margin of safety as a percentage of sales is closest to A 73% B. 79% C. 21% D. 27%