Waterproof Roofing Company has provided the following information: Sales revenue Variable costs Fixed costs $777,000 504,000 216,000 Which of the following statements is true, if the sales volume increases by 12%? O A. Operating income will increase by $32,760. OB. Operating income will increase by $60,480. O c. Contribution margin will increase by $93,240. OD. Fixed expenses will increase by $25,920