Fixed expenses are $106,000 per month. The company is currently selling 2,000 units per month. The marketing manager would like to cut the selling price by $15 and increase the advertising budget by S5,000 per month. The marketing manager predicts that these two changes would increase monthly sales by 800 units. What should be the overall effect on the company's monthly net operating income of this change? 18) A) decrease of $31,000 B) increase of $31,000 C) increase of $103,000 D) increase of $1,000 de oblece 19) A product sells for $10 per unit and has variable expenses of $6 per unit. Fixed expenses total $45,000 per month. How many units of the product must be sold each month to yield a monthly profit of $15,000? 19) A) 10,000 units B) 6,000 units C) 3,750 units D) 15.000 units