The following information was summarized from the records of the Muentes Company for the first quarter of the year: Sales $ 700,000 Fixed Administrative Expenses 110,000 Fixed Cost of Goods Sold 100,000 Fixed Selling Expenses 50,000 Variable Administrative Expenses 30,000 Variable Cost of Goods Sold 220,000 Variable Selling Expense 170,000 The company's gross margin for the quarter was: a. $380,000 b. $440,000 c. $420,000 d. $280,000