Required information Exercise 6-5 Changes in Variable Costs, Fixed Costs, Selling Price, and Volume (LO6-4) (The following information applies to the questions displayed below.) Data for Hermann Corporation are shown below: Percent of Sales 100% Per Unit $ 70 49 Selling price Variable expenses Contribution margin 70 30% Fixed expenses are $74,000 per month and the company is selling 4,400 units per month. Exercise 6-5 Part 1 Required: 1-a. How much will net operating income increase (decrease) per month if the monthly advertising budget increases by $9,800 and monthly sales increase by $24,000? 1-b. Should the advertising budget be increased