Zeeb Corporation produces and sells a single product. Data concerning that product appear below:

Fixed expenses are $355,000 per month. The company is currently selling 5,000 units per month. The marketing manager believes that a $12,000 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?

Per Unit $ 150 Selling price Variable expenses Contribution margin $ 90 Percent of Sales 100% 60 40% 60%