I found her locker. What now?

Hint 1 of 5:

Remember the combination?

Hint 2 of 5:

It should be in your notebook.

Hint 3 of 5:

Type it in.

Hint 4 of 5:

Look around her locker.  You should find cocaine.

Hint 5 of 5:

Click your notebook on the locker.