The University Store, Incorporated is the major bookseller for four nearby colleges. An income statement for the first quarter of the year is presented below University Store, Incorporated Income Statement For the Quarter Ended March 31 Sales $ 800,000 Cost of goods sold 560,000 Gross margin 240,000 Selling and administrative expenses: Selling $ 100,000 Administrative 110,000 210,000 Net operating income $ 30,000 On average, a book sells for $40.00. Variable selling expenses are $3.00 per book; the remaining selling expenses are fixed. The variable administrative expenses are 5% of sales; the remainder of the administrative expenses are fixed The contribution margin for the University Store for the first quarter is