Candy Sales for                           1
                         Field Trip by Class

------------------------------ class=14 ------------------------------

                                  date_    candy_
            Obs     name       returned     type      profit

              1    Nathan     21MAR2012      CD       $23.75
              2    Matthew    21MAR2012      CD       $17.50
              3    Claire     22MAR2012      CD       $13.75
              4    Chris      25MAR2012      CD        $7.50
          -----                                      -------
          class                                       $62.50


------------------------------ class=21 ------------------------------

                                  date_    candy_
            Obs    name        returned     type      profit

              5    Adriana    21MAR2012      MP        $8.75
              6    Ian        24MAR2012      MP       $22.50
              7    Anthony    25MAR2012      MP       $16.25
              8    Erika      25MAR2012      MP       $21.25
          -----                                      -------
          class                                       $68.75
                                                     =======
                                                     $131.25