Order By in a Group

Question

Hi All,
I have a drill down report of Product Sales. The top level of the drill down is the Product with total sales for that Product, then when you click on it, it shows a drill down of the Sales for that Product for each different store.
In the 'Group Sort Expert', I have selected 'Top N', based on Sales where N is set by a formula (in the formula it is set to a parameter of the report so the user can select Top 10, Top 20  etc.)
What I now want to do is order the results by the Style code of the Products, but I can't see how this is possible, since there is no further order by within the group sort.
If I change the "Sort Fields" order in the Record Sort Expert, this appears to have no effect, since it is still sorted by the Group Top N sort.
What I want to achieve is say, the Top 50 selling Products, but ordered by the Product Style Code (unique for each Product) rather than the Sales amount.
Any pointers on how to achieve this would be appreciated !!

Answer 1

Arrghh. Thought I'd sorted this, but I have one more problem.
I have something like this where columns A,B and C are numeric:
Top Level : Product Code, Product Name, A, B, C
Drill Down :  
London..........................................a1...b1...c1
New York......................................a2...b2...c2
Paris.............................................a3...b3...c3
now A : Sum(a) i.e. a1a2a3
       B : Sum(b) i.e. a1a2a3
       c :  if b = 0 then 0 else (a/b)*100
       C : if Sum(b) = 0 then 0 else Sum(a)/Sum(b)
so for example I might get
Top Level : ABC, Widget1, 185, 67, 276.1
Drill Down :
London.............................................55...20...275
New York.........................................60...22...272
Paris................................................70...25...280
All I want to do is group the report by the value of C in descending order, but since C is a formula it doesn't appear in the summary, so I can't use the Group Sort Expert to do it. I can't add something like Max(c) and sort on that, since that might give a different order. I can't use average of c, since that is not correct either, and I need to ignore any values of c that are zero. I can't add a summary of the formula since Crystal canlt cope with summaries of summaries.
What am I missing here - it should be straightforward I would think ?
All I can think of at the moment is to go back to the stored proc again and add another column to the result set that is the summary column C on every Location line, but that seems a bit of a cludge. Mind you I find myself doing nasty hacks all over the place in Crystal to acheive the results I want. sigh