Wrobbel Corporation produces and sells a single product. Data concerning that product appear below: Per Unit Percent of Sales Selling price $ 270 100% Variable expenses 81 30% Contribution margin $ 189 70% Fixed expenses are $190,000 per month. The company is currently selling 1,400 units per month. Management is considering using a new component that would increase the unit variable cost by $42. Since the new component would improve the company's product, the marketing manager predicts that monthly sales would increase by 300 units. Required: What should be the overall effect on the company's monthly net operating income of this change if fixed expenses are unaffected? (Negative amount should be indicated by a minus sign.)