The three seventh grade classes at MAMS collected the most boxtops for a school fundraiser, and so they won a $600 prize to share among them. Mr. Sullivan's class collected 3,760 box tops, Mrs. Gobrick's class collected 2,301, and Mrs Patterson's class collected 1,855. How should they divide the money so that each class gets the same fraction of the prize money as the fraction of the box tops that they collected?