All together, the students collected 3,760+2,301+1,855=7,916 box tops.
Mr. Aceves’ class collected 3760/7916 of the box tops.
Mrs. Baca’s class collected 2301/7916 of the box tops.
Mr. Canyon’s class collected 1855/7916 of the box tops.
The amount for Mr. Aceves’ class is 3760/7916×600≈284.99
The amount for Mrs. Baca’s class is 2301/7916×600≈174.41
The amount for Mr. Canyon’s class is 1855/7916×600≈140.60
So $284.99 should go to Mr. Aceves’ class, $174.41 should go to Mrs. Baca’s class, and $140.60 should go to Mr. Canyon’s class.