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Required information The following information applies to the questions displayed below] Data for Hermann Corporation are shown below. Fixed expenses are $84,000 per month and the company is selling 2,600 units per month Tequired: a. How much will net operating income increase (decrease) per month if the monthly advertising budget increases by $8,900, the onthly sales volume increases by 100 units, and the total monthly sales increase by $12,000 ? b. Should the advertising budget be increased