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   Let's suppose a summary value must be printed before printing the records
   on which the summary will be made. Considering the above example, the
   system will thus write the number of total clients for each city in the
   Group Header.

   In this case, the summary variable must be given the Pre-computed
   attribute. This allows to evaluate the variable before the data to which
   it refers is printed.

   The possibility to pre-compute a value is always referred to the group
   immediately following the band in which the pre-computed value is
   inserted. This means that if the pre-computed summary value is inserted in
   the group Header, this value will be referred to all and only those
   records of that group.

   To choose whether or not a value is to be pre-computed, assign a value to
   the parameter Computed variable type, available as one of the
   properties of the Computed variable. The value accepted are:

     . Not pre-computed

     . Pre-computed