I found a way to detect the LAST page of each employee.

I define TWO functions:
function initgroup
public groupflag
groupflag=0
endfunc

function endgroup
groupflag=1
endfunc

Then in the group header band, on entry run expression, I put
initgroup()


And in the group footer band, on exit run expression:
endgroup()

In the page footer band I put the totals which are to be printed AFTER the employee (group) has finished, with a "print when" condition of
groupflag=1

I tested it. It worked.

Thanks to all.