Larita Corporation produces and sells a single product. Data concerning that product appear below Percent of Per Unit Sales Selling price Variable expenses $200 50 100% 25% Contribution margin $150 75% Fixed expenses are $342,000 per month. The company is currently selling 3,700 units per month. The marketing manager believes that a $11,000 increase in the monthly advertising budget would result in a 100 uni increase in monthly sales. Required: What should be the overall effect on the company's monthly net operating income of this change? (Negative amount should be indicated by a minus sign.) Change in net operating income