AJ sold 220 candy bars to raise money for their community softball league. Milk chocolate candy bars sold for $3 each, and dark chocolate candy bars sold for $4 each. AJ sold $720 worth of candy bars. The system of equations below represents the sales of candy bars. m+d=220 3m + 4d = 720 How many dark chocolate candy bars did AJ sell? Enter your answer in the box.
