2. Granite Corporation produces and sells a single product. In September, the company sold 1,900 units. Its total sales were $152,000, its total variable expenses were $79,800, and its total fixed expenses were $56,700. Calculate the contribution margin and variable expense percentages. Calculate the net operating income. 3. Qualcom Corporation has provided the following contribution format income statement. All questions concern situations that are within the relevant range. Sales (7,000 units) Variable expenses Contribution margin Fixed expenses Net operating income Required: $ 350,000 245,000 105,000 97,500 $ 7,500 a. If sales increase to 7,040 units, what would be the estimated increase in net operating income? b. If sales decline to 6,900 units, what would be the estimated net operating income?