Data for Hermann Corporation are shown below: Selling price Variable expenses Contribution margin Percent Per Unit of Sales $ 90 100% 70 $ 27 30% 63 Fixed expenses are $30,000 per month and the company is selling 2,000 units per month Required: 1-a. How much will net operating income increase (decrease) per month if the monthly advertising budget increases by $5,000 and monthly sales increase by $9,000? 1-6. Should the advertising budget be increased? Complete this question by entering your answers in the tabs below. Req IA Reg 1B How much will net operating income increase (decrease) per month if the monthly advertising budget increases by $5,000 and monthly sales increase by $9,000? Net operating income by