urtle Corporation produces and sells a single product. Data concerning that product appear below: Per Unit Percent of Sales Selling price $ 150 100 % Variable expenses 75 50 % Contribution margin $ 75 50 % The company is currently selling 6,500 units per month. Fixed expenses are $206,000 per month. The marketing manager believes that a $6,300 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?