Sorry, DBlank and I thought that you were using running totals.

For shared variables you would some more formulas.

The grand total would stay as it is, you would make the group 2 footer something like:
shared numbervar g1tot;
shared numbervar totAbsence;
shared numbervar absence;
if absence> = 3 then (
   totAbsence: totAbsence + = 1;
   g1tot := g1tot + 1;
);
"" / / Hide the full incrementing

in g1 header
shared numbervar g1tot := 0;
//

in g1 footer
shared numbervar g1tot

HTH