A Corporation has provided the following contribution format income statement. Sales (2,000 units) $ 40,000 Variable expenses 24,000 Contribution margin 16,000 Fixed expenses 11,200 NOI $ 4,800 If the selling price increases by $4 per unit and the sales volume decreases by 200 units, the net operating income would be O $7,200. O $10,400. O $12,800. $11,520