Wesley's income statement is as follows: Sales (10,000 units) $150,000 Less variable costs - 48,000 Contribution margin $102,000 Less fixed costs - 24,000 Net income $ 78,000 If sales increase by 1,000 units, profits will: Increase by $12,000 Increase by $10,200 Increase by $4,800 Increase by $8,000