Required information Exercise 6-5 (Algo) 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 $75,000 per month and the company is selling 4,000 units per month. Exercise 6.5 (Algo) Pert 1 Required: 1.a. How much will net operating income increase (decrease) per month if the monthly advertising budget increases by $9,900, the monthly sales volume increases by 100 units, and the total monthly sales increase by $7,500 ? b. Should the advertising budget be increased? Complete this question by entering your answers in the tobs below. How much will net operating income increase (decrease) por month if the monthly advertiaing budget increases by $9,900, the monthly sales volume increases by 100 units, and the total monthly sales increase by $7,500 ? (D0 not round intermediate: calculations.)