A company has provided the following data: Sales 3,000 units Sales price $70 per unit Variable cost $50 per unit Fixed cost $25,000 If the dollar contribution margin per unit is increased by 15%, total fixed cost is increased by 10%, and all other factors remain the same, net operating income will:

increase by $6,500

increase by $11,500

increase by $13,500

increase by $7,500