Required information Skip to question [The following information applies to the questions displayed below.] Data for Hermann Corporation are shown below: Per Unit Percent of Sales Selling price $ 60 100% Variable expenses 39 65 Contribution margin $ 21 35% Fixed expenses are $72,000 per month and the company is selling 4,200 units per month. 2-a. Refer to the original data. How much will net operating income increase (decrease) per month if the company uses higher-quality components that increase the variable expense by $4 per unit and increase unit sales by 25%. 2-b. Should the higher-quality components be used