O'Neill, Incorporated's income statement for the most recent month is given below. Sales.......... Variable expenses.. ion Contribution margin. Traceable fixed expenses...... Segment margin. Common fixed expenses....... Net operating income Total Store A $300,000 $100,000 $200,000 192,000 72.000 120,000 Store B 108,000 28,000 80,000 Fi 76,000 21,000 55,000 32,000 $ 7,000 $25,000 27,000 $ 5,000 A proposal has been made that will lower variable expenses in Store A to 62% of sales. However, this reduction can only be accomplished by an increase in fixed expenses of $8,000. If this proposal is implemented and sales remain constant, overall company net operating income should: Select one: O a. remain the same O b. decrease by $4,200 O c. increase by $2,000 O d. increase by $8,000