Custom Grouping

My reqmt is to group records based on items purchased. I hv 2 groups cat1 ,cat2 with different set of items in them. My third group cat3 will contain customers who have purchased any items from cat1 AND cat2.

My formula is something like
if {table.itemnumber} in ['abc','def',..] then 'cat1:'
else
if {table.itemnumber} in ['xyz','lkm',...] then 'cat2:'
else
if ({table.itemnumber} in ['abc','def',...] AND {table.itemnumber} in ['xyz','lkm',...]) then 'cat3'

Am not able to get the cat3(3rd Group) on my report. Any thots on wat I cud b missing?

Am using Crystal Reports XII'd guess that your condition checks are in the wrong order.
You'll never get to the final if statement 'cos one of the previous two will always be true if the 3rd is true.|||Sorry if i have confused u. My reqmt is to get a count of all customers who buy items. Cat1 will have a set of items. Cat2 will have another set of items. My third group will contain items frm both cat1 and cat2. I sud basically get a count of customers in each cat.

I have grouped my report on items using the formula
if {table.itemnumber} in ['abc','def',..] then 'cat1:'
else
if {table.itemnumber} in ['xyz','lkm',...] then 'cat2:'
else
if ({table.itemnumber} in ['abc','def',...] AND {table.itemnumber} in ['xyz','lkm',...]) then 'cat3'

My report sud luk something like this :
Count(customer)
Cat1 xxxx
Cat2 xxxxx
Cat3 xxx(sud be the count of customers who hv bought frm cat1 and cat2)|||Assuming that your cat1 items and cat2 item lists are mutually exclusive then the 3rd if statement can never be true.
If there is an overlap (which I suspect there isn't, otherwise an item would be both a cat1 and cat2 item) then my previous comment is still true.

i.e. you will never get a cat3 with that formula.

Your main problem, however, is that you want to catagorise a customer, and your formula categorises an item.