Hargain Textbook Company's income statement for the month of June is as follows: Sales Cast of goods sold Gross profit Selling and administrative expenses $900,000 (630,000) $270,000 Selling expenses Administrative expenses Operating income (100,000) (104.000) (204,000) $66,000 Each textbook sells for $50. Variable selling expenses are $5 per book, and the remainder of the selling expenses are fixed. Variable administrative expenses are 4% of sales, and the remainder of the administrative expenses are fixed. Assume "Y" equals the total selling and administrative expenses and "x" equals the total number of books sold. What is the mixed cost formula for total selling and administrative expenses? O Y $102,000 - $9X Y5102.000 + $7X OY$78.000 - $5X Y-578.000 $7X None of the above