Prepare a contribution format income statement for Susan. (Round answers to O decimal places, e.g. 5,275. Sales Revenue Variable Expenses Cost of Goods Sold Administrative Expense Selling Expense Total Variable Expenses Contribution Margin Fixed Expenses Selling Expense Administrative Expense Total Fixed Expenses Operating Income $Show Attempt History Current Attempt in Progress Susan Wilson sells gourmet chocolate chip cookies. The results of her last month of operations are as follows: Sales revenue $ 160,000 Cost of goods sold (all variable) 100,000 Gross margin 60,000 Selling expenses (75% variable) 12,000 Administrative expenses (25% variable) 20,000 Operating income $ 28,000