Shelhorse Corporation produces and sells a single product Data concerning that product appear below: Selling price Variable expenses Contribution margin Per Unit $180 72 $ 100 Percent of Sales 100% 40% 60% 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