Required information Exercise 6-5 Changes in Variable Costs, Fixed Costs, Selling Price, and Volume [LO6-4] [The following information applies to the questions displayed below.] Data for Hermann Corporation are shown below: Fixed expenses are $87,000 per month and the company is selling 2,900 units per month. Exercise 6-5 Part 1 Required: l-a. How much will net operating income increase (decrease) per month if the monthly advertising budget increases by $9,200 and monthly sales increase by $20,250 ? l-b. Should the advertising budget be increased? Complete this question by entering your answers in the tabs below. How much will net operating income increase (decrease) per month if the monthly advertising budget increases by $9,200 and monthly sales increase by $20,250 ? (Round any unit calculations up to the nearest whole unit.)