6 2 points Data for Whitewater Corporation are shown below: Selling Price Variable Expenses Contribution Margin Per Unit Percent of Sales $135 100% 81 $54 60 40% Fixed expenses are $87,000 per month and the company is selling 2,900 units per month. How much will net operating income increase (decrease) per month if the monthly advertising budget increases by $9,200, the monthly sales volume increases by 100 units, and the total monthly sales increase by $13,500? Type your answer... -DII