$\backslash$table$[[,$Per Unit,Sales$],[$Selling price,$$105,100\%$

sale S 100% Selling price Variable expenses Contribution margin Per Unit $ les 63 $ 42 Fixed expenses are $81,000 per month and the company is selling 3,800 units per month. Required: I-a. How much will net operating income increase (decrease) per month if the monthly advertising budget increases by $8,600, the monthly sales volume increases by 100 units, and the total monthly sales increase by $10,500? I-b. Should the advertising budget be increased?