Have created a formula field which assigns a conversion to certain values.  IS there any way I can create a summary of the formula field?

When I select Insert Summary I am unable to see my formula in the selection window

Thanks for the update Venky,

I tried to create a var, and sum the values using the following formula:

whileprintingrecords;
shared NumberVar RTotal;

If {Command.SUM(WRKD_MINUTES)}= 1 and {Command.UNIT} > '0:00'  Then
RTotal :=
    ToNumber ({Command.UNIT})

else If {@Grouping_5}='Casual Loading 22.5%' Then
RTotal :=
    SUM ({@OA_Wrk}, ({Command.EMPLOYEE_HISTNAME}))-SUM ({@OA_PS},({Command.EMPLOYEE_HISTNAME}))

ELSE
RTotal :=
  {Command.SUM(WRKD_MINUTES)};

I then called the value by:

whileprintingrecords;
shared numbervar RTotal;

The problem is that I still need to group by the description of the codes returned and display the summed value that relates to the description

Any help would be greatly appreciated

Regards,

Despina