Required information (The following information applies to the questions displayed below.) Data for Hermann Corporation are shown below: Per Unit $ 110 Percent of Sales 1001 Selling price Variable expenses Contribution margin 70 $ 33 308 Fixed expenses are $82,000 per month and the company is selling 3,500 units per month. Required: 1-a. How much will net operating income increase (decrease) per month if the monthly advertising budget increases by $8,700 and monthly sales increase by $18,500? 1-b. Should the advertising budget be increased? Complete this question by entering your answers in the tabs below. Req 1A Reg 1B How much will net operating income increase (decrease) per month if the monthly advertising budget increases by $8,700 and monthly sales increase by $18,500? (Do not round Intermediate calculations.) Net operating income by