An income statement for Sam's Bookstore for the first quarter of the year is presented below: Sam's Bookstore Income Statement For Quarter Ended March 31 Sales $910, 000 Cost of goods sold Gross margin Selling and administrative expenses 645, 000 265,000 Selling $103,000 Administration 110,000 213,000 Net operating income $ 52,000 On average, a book sells for $65. Variable selling expenses are $6 per book with the remaining selling expenses being fixed. The variable administrative expenses are 5% of sales with the remainder being fixed. The net operating income using the contribution approach for the first quarter is: Multiple Cholce $265,000 $181,000 $135,500 $52,000