19. G Co., which is a biotechnology firm, reported the following revenues on their 2012 income statement: Product sales $582.2 million, Royalties $214.7 million, Contract revenue $107.0 million and Interest income $64.1 million. Their cost of sales were reported as $104.5 million. What was their gross profit percentage? A. 82.1% B. 86.9% C. 88.4% D. 89.2%