Thornbrough Corporation produces and sells a single product with the following characteristics: Percent Per Unit of Sales Selling price $ 220 1008 Variable expenses 44 203 Contribution margin $ 176 808 The company is currently selling 7000 units per month. Fixed expenses are $901,000 per month. The marketing manager believes that a $28,000 increase in the monthly advertising budget would result in a 190 unit increase in monthly sales. What should be the overall effect on the company's monthly net operating income of this change? 20:20 Multiple Choice increase of $33.440 decrease of $5,440 Help Save & Exit The company is currently selling 7,000 units per month. Fixed expenses are $901,000 per month. The marketing manager believes that a $28,000 increase in the monthly advertising budget would result in a 190 unit increase in monthly sales. What should be the overall effect on the company's monthly net operating income of this change? Multiple Choice Increase of $33,440 decrease of $5,440 decrease of $28,000 Increase of $5.440