Corporation produces and sells a single product. Data concerning that product appear below Selling price Variable p Contribution margin Per Unit $ 130 Percent of Sales 100% 52 78 40% 60% The company is currently selling 6500 units per month. Fixed expenses are $209,000 per month. The marketing manager believes that a $7200 increase in the monthly advertising budget would result in a 120 unit increase in monthly sales What should be the overall effect on the company's monthly net operating income of this change? Oase of $210 O increase of $300 One of $2180 of $7200