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 530,000 Gross margin 380,000 Selling and administrative expenses Selling $ 113,000 Administration 130,000 243,000 Net operating income $ 137,000 On average, a book sells for $70. Variable selling expenses are $5 per book with the remaining selling expenses being fixed. The variable administrative expenses are 3% of sales with the remainder being fixed. The cost formula for selling and administrative expenses with "X" equal to the number of books sold is:

Multiple Choice Y = $164,300 + $5.00X Y = $164,300 + $7.10X Y = $150,700 + $9.20X Y = $150,700 + $7.10X