Data for Hermann Corpotation are shown belows Tixed expenses are $78,000 per month and the company is selling 3,500 units per month. Required: 1.a. How much will net operating income increase (decrease) per month if the monthly advertising budget increases by $8,300, the monthly sales volume increases by 100 units, and the total monthly sales increase by $9.000 ? 1.b. Should the advertlsing budget be increased? Complete this question by entering your answers in the fabs below. How much will net operating income increase (decrease) per month if the monthly odvertising budget increases by $8,300, the monthly sales volume increases by 100 units, arid the total monthily sales increase by $9,000 ? (Do not round intermediate