400
Ms. Biddle ordered 20 boxes of pizza for the fourth grade class. Each box of pizza contains 15 slices of pizza., and each student will receive two slices of pizza. There are 7 fourth-grade with 25 students in each class. Ms. Biddle told the team leader that she would give her any extra slices that she needed. How many pieces of pizza did Ms. Biddle give the team leader?
What is 50 slices of pizza?