alt comman control optocommand 21. Grable Corporation produces and sells a single product. Data con below: Per Unit $230 69 $161 Percent of Sales 100% 30% 70% Selling price Variable expenses Contribution margin Fixed expenses are $628,000 per month. The company is currently selling 5,000 units per month. The marketing manager would like to cut the selling price by $18 and increase the advertising budget by $45,000 per month. The marketing manager predicts that these two changes would increase monthly sales by 800 units. What should b e the overall effect on the company's monthly net operating income of this change