Exercise 2-13 Restate the following income statement for a retailer in contribution format. $ 75,000 Sales revenue ($100 per unit) 42,000 Less cost of goods sold ($56 per unit) Gross margin 33,000 Less operating costs: Commissions expense ($5 per unit) $3,750 Salaries expense 7,900 Advertising expense 5,800 Shipping expense ($2 per unit) 1,500 18,950 $14,050 Operating income Per Unit Open Show Work Click if you would like to Show Work for this