Waterproof Roofing Company has provided the following information: Sales revenue Variable costs Fixed costs $780,000 505,000 218,000 Which of the following statements is true, if the sales volume increases by 14%? O A. Operating income will increase by $70,700 O B. Fixed expenses will increase by $30,520 O C. Operating income will increase by $38,500. OD. Contribution margin will increase by $109,200