MEGAFRAME COMPUTER COMPANY Balance Sheet As of December 31 ASSETS Cash Accounts receivable Inventory Net plant and equipment Total assets LIABILITIES AND STOCKHOLDERS' EQUITY Accounts payable Short-term Notes payable Long-term debt Common stock Retained earnings Total liabilities and stockholders' equity $50,000 70,000 110,000 220,000 $450,000 Refer to the tables above. Compute Megaframe's profit margin. A. 5.7% B. 15.4% C. 18.9% D. none of the choices E. 13.2%