Required information: Exercise 5-5 Changes in Variable Costs, Fixed Costs, Selling Price, and Volume (LO5-4] [The following information applies to the questions displayed below] Data for Hermann Corporation are shown below: Percent of Selling price Variable expenses Contribution margin Per Unit $125 Sales 100% 80 $ 45 64 36% Fixed expenses are $85,000 per month and the company is selling 2,700 units per month. Exercise 5-5 Part 1 Required: 1-a. How much will net operating income increase (decrease) per month if the monthly advertising budget increases by $9,000 and monthly sales increase by $20,000? 1-b. Should the advertising budget be increased? Complete this question by entering your answers in the tabs below. Req 1A Req 18 How much will net operating income increase (decrease) per month if the monthly advertising budget increases by $9,000 and monthly sales increase by $20,000? (Round any unit calculations up to the nearest whole unit.) Net operating income by