Exercise 6-5 (Static) Changes in Variable Costs, Fixed Costs, Selling Price, and Volume [LO6-4] 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 $ 90 100% Variable expenses 63 70 Contribution margin $ 27 30% Fixed expenses are $30,000 per month and the company is selling 2,000 units per month. Exercise 6-5 (Static) 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 $2 per unit and increase unit sales by 10%. 2-b. Should the higher-quality components be used?