Shelhorse Corporation produces and sells a single product. Data concerning that product appear below Selling price Variable expenses Contribution margin Der Unit $180 72 $ 108 Percent or sales 1001 400 500 Fixed expenses are $347.000 per month. The company is currently selling 4,200 units per month Required: The marketing manager believes that a $16,000 increase in the monthly advertising budget would result in a 160 unit increase in monthly sales. What should be the overall effect on the company's monthly net operating income of this change? Change in net operating income