3 bints 00:59:34 TB Problem Qu. 6-223 (Algo) Shelhorse Corporation produces and... Shelhorse Corporation produces and sells a single product. Data concerning that product appear below. Selling price Percent of Per Unit Sales $ 100 100% 30 30% Contribution margin $ 70 .70% Variable expenses Fixed expenses are $356,000 per month. The company is currently selling 5,100 units per month. Required: The marketing manager believes that a $13,000 increase in the monthly advertising budget would result in a 250 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