Creation of Sub-Totals within Groups

Question

Hi - hope this is me just being a plank but I've hit a brick wall whilst trying to recreate a set of management accounts. So far the report has just two Groups - call them A & B for ease. Group B summarizes the detail and Group A neatly collects the results from Group B.
Group A  comprises 6 parts all doing their bit and all the standard Crystal Sub-Totals (Summaries) work just fine. The problem I encounter is when I need to insert another Sub-Total into Group A which summarizes multiple parts of Group A e.g. Part 1 is Sales, Part 2 is Cost of sales, Part 3 is Labour, Part 4 is Expenses, Part 5 is Other and Part 6 is Depreciation. I need to insert a Sub-Total between Parts 3 and 4 which basically gives a total of Sales minus Cost of Sales minus Labour and to then continue with Parts 4 to 6. This is obviously a huge simplification of the issue but an answer to this would let me proceed with everything else.
I've tried creating an line so I can add a formula for this by giving it a name of its own in Group A but it fails to appear on the report. I've also tried the 'Insert Section Below' option and whilst I can suppress it where necessary the formula just picks up values from the last entry on the Detail Section.
Any ideas where I am making some elementary mistakes and is there an easy solution? Many thanks

Answer 1

Hi,
  Try to create a manual running total formula for summing the fields with a condition.
Create a @reset formula and place it report header:
formula:
whileprintingrecords;
numbervar i:=0;
Create a @eval formula and place it in group header A:
formula:
whileprintingrecords;
numbervar i;
if {groupname.field} = 'Labour' or {groupname.field} = 'Expenses'  then
i:= i + {summary.field};
Create a @display formula and place it in report footer;
formula:
whileprintingrecords;
numbervar i;
Hope this helps!
Regards,
Vinay