How much points do you need to get an a in re5 mercenaries?

In Resident Evil 5's Mercenaries mode, you need to achieve a score of 60,000 points to earn an "A" rank. Scoring is based on the number of enemies defeated and the time taken to complete the level. Achieving a high combo and using weapons effectively can help boost your score. Additionally, collecting items and maximizing your efficiency in each round will contribute to reaching this target.