Crystal Reports how to sum the HOURS in a group

Message

   Hi,
How to sum up the total of all the HOURS except 'ZZ' which should be summed up seperately.
hope u got me.
Example: (output should be as below).
nadeem    5
shyub       5
ayub         5
ZZirshad   5
Reported Production Hours:     15 (nadeem + shyub + ayub)
Reported NonProduction Hours:  5 (ZZirshad)

This report which i have asked now already exists..now i have to modify the report with the changes which i have explained to you above. In the existing report, the record selection formula that exists is,
{HR01.HR01015} like {?Department} and
{EPS_Timesheet_Validation.FNTransactDate} = {?DateRange} and
Switch ({?Non_Productive_Time}='Exclude Non Productive Time',Not ({EPS_Timesheet_Validation.FNProjectNo} like 'ZZ*'),
{?Non_Productive_Time}='Include Non Productive Time',{EPS_Timesheet_Validation.FNProjectNo} like '*',
{?Non_Productive_Time}='Only Non Productive Time',{EPS_Timesheet_Validation.FNProjectNo} like 'ZZ*')

Please help me.
Thanks.,