O'Neill, Incorporated's income statement for the most recent month is given below. Total Store A Store B Sales $300,000 $100,000 $100,000 $200,000 Variable expenses 192,000 72.000 120,000 Contribution margin 108,000 28,000 80,000 Traceable fixed expenses 76,000 21,000 55,000 Segment margin 32,000 $ 7,000 $ 25,000 Common fixed expenses 27,000 I Net operating income $ 5,000 If Store B sales increase by $20,000 with no change in traceable fixed expenses, the overall company net operating income should: increase by $2.500 O'Neill, Incorporated's income statement for the most recent month is given below. Total Store A Store B Sales $300,000 $100,000 $200,000 Variable expenses 192,000 72,000 120,000 108,000 Contribution margin 80,000 28,000 Traceable fixed expenses 76.000 21,000 55,000 32,000 Segment margin $ 25,000 $ 7,000 Common fixed expenses 27,000 Net operating income $ 5,000 The marketing department believes that a promotional campaign at Store A costing $5,000 will increase sales by $15,000. If its plan is adopted, overall company net operating income should