Required information The following information applies to the questions displayed below] Data for Hermann Corporation are shown below: Percent o Sales 100% 65 358 Per Unit $ 120 Selling price Variable expenses Contribution margir 78 42 ixed expenses are $84,000 per month and the company is selling 2,600 units per month. Required: 1-a. The marketing manager argues that a $8,900 increase in the monthly advertising budget would increase monthly s $19,500. Calculate the increase or decrease in net operating income. 1-b. Should the advertising budget be increased