O'Neincorporated's segmented income statement for the most recent month is given below Sales Variable expenses Total $161,400 51,546 Store A $62,200 26,746 Store B $99,200 24.800 Contribution margin Traceable fixed expenses 109,854 72,400 35,454 22,400 74,400 50,000 $13,054 $24.400 Segment margin Common fixed expenses 37.454 15.700 Net operating income $ 21754 The marketing department believes that a promotional campaign at Store A costing $13,200 will increase sales by $24,600 If its plan is adopted, overall company net operating income should decrease by $822 increase by $822 increase by $11,400 O decrease by $6.765