An income statement for Sam's Bookstore for the first quarter of the year is presented below: On average, a book sells for $60. Variable selling expenses are $5 per book with the remaining selling expenses being fixed. The variable odministrative expenses are 4% of soles with the remainder being fixed. The contribution margin for Sam's Bookstore for the first quarter is: Multiple Choice $185,000 On average, a book sells for $60. Variable selling expenses are $5 per book with the remaining selling expenses being fixed. The varlable administrative expenses are 4% of sales with the remainder being fixed. The contribution margin for Sam's Bookstore for the first quarter is: Muitiple Choice $185,000 $751,000 $149,000 $789,000