Required information Exercise 5-5 Changes in Variable Costs, Fixed Costs, Selling Price, and Volume (LO5-4] [The following information applies to the questions displayed below.] Data for Hermann Corporation are shown below: Percent of Sales 100% Selling price Variable expenses Contribution margin Per Unit $ 120 78 $ 42 65 35% Fixed expenses are $84,000 per month and the company is selling 2,600 units per month. Exercise 5-5 Part 2 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 $5 per unit and increase unit sales by 20%. 2-b. Should the higher-quality components be used