Turtle Corporation produces and sells a single product. Data concerning that product appear below: Percent of Per Unit Selling price Variable expenses Contribution margin $150 75 $ 75 Sales 100% 50% 50% The company is currently selling 5,600 units per month. Fixed expenses are $187,000 per month. The marketing manager believes that a $6,600 increase in the monthly advertising budget would result in a 170 unit increase in monthly sales. What should be the overall effect on the company's monthly net operating income of this change? Multiple Choice decrease of $6,150 Multiple Choice decrease of $6,150 increase of $12,750 decrease of $6,600 increase of $6,150