The following information applies to the questions displayed below.] Data for Hermann Corporation are shown below: Selling price Variable expenses Contribution margin Per Unit $140 91 s 49 Percento Sales 1008 65 358 Flxed expenses are $88,000 per month and the company is selling 3,000 units per month. Required: 1-a. The marketing manager argues that a $9,300 increase in the monthly advertising budget would increase monthly sales by $21,500. Calculate the increase or decrease in net operating income. 1-b. Should the advertising budget be increased? Complete this question by entering your answers in the tabs below. Req 1A Req 18 The marketing manager argues that a $9,300 increase in the monthly advertising budget would increase monthly sales by $21,500. Calculate the increase or decrease in net operating income. (Do not round intermediate calculations.)