Data for Hermann Corporation are shown below: Selling price Variable expenses Contribution margin Per Unit $ 80 44 $ 36 Percent of Sales 1000 55 458 Fixed expenses are $76,000 per month and the company is selling 2,500 units per month. Required: 1-a. How much will net operating income increase (decrease) per month if the monthly advertising budget ind monthly sales increase by $14,4097 1-b. Should the advertising budget be increased? by $8,100 and 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 $8,100 and monthly sales increase by $14,400? (Round any unit calculations up to the nearest whole unit.) Net operating income by Reg 13 >