help please

TB Problem Qu. 5-239 (Algo) Shelhorse Corporation produces and... Fixed expenses are $354,000 per month. The company is cunvm, iling 4,900 units per month. Required: The marketing manager believes that a $23.000 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