14) Data concerning Lemelin Corporation's single product appear below: Selling price Variable expenses Contribution margin Per Unit $ 230 115 $ 115 Percent of Sales 100% 50% 50% The company is currently selling 7,000 units per month. Fixed expenses are $581,000 per month. The marketing manager believes that an $11,000 increase in the monthly advertising budget would result in a 100 unit increase in monthly sales. What should be the overall effect on the company's monthly net operating income of this change? A) decrease of $11,000 B) increase of $11,500 C) decrease of $500 D) increase of $500