Feather Friends, Incorporated, distributes a high-quality wooden birdhouse that sells for $20 per unit. Variable expenses are $8 per unit, and fixed expenses total $180,000 per year. Its operating results for last year were as follows: Sales Variable expenses Contribution margin Yixed expenses Net operating income $ 400,000 160,000 240,000 180,000 $ 60,000 Reg 1 Reg 2 Reg 3 Req 4A Reg 4B Req 5A Req 5B Req 6 The sales manager is convinced that a 10% reduction in the selling price, combined with a $30,000 increase in advertising, would increase this year's unit sales by 25%. If the sales manager's ideas are implemented, how much will net operating income increase or decrease over last year? (Negative amounts should be input with a minus sign.) innen de