Current Attempt in Progress Restate the following income statement for a retailer in contribution format. Sales revenue [$100 per unit] $ 93,000 Less cost of goods sold [$53 per unit} 53,940 Gross margin 33,060 Less operating costs: Commissions expense [$? per unit} $ 6,510 Salaries. expense ?,900 Advertising expense 6,000 Shipping expense {$3 per unit} 2,?5'0 23,200 Uperatingincome $ 15,860