Restate the following income statement for a retailer in contribution format.
Sales revenue ($100per unit) $92,000
Less costs of goods sold($62 per unit) 57,040
Gross margin 34,000
Less operating costs: Commissions expense($7 per unit)$6,400 Salaries expense 7,900
Advertising expense 6,000 Shipping expense ($1 per unit) 920 21,260
Operating income $13,700.