Problem with calculated column, everything inc. NULLs appear

Good morning,
This one is tough.
I have a dimension Category (with categories: Fruits, Vegies, Canned, etc.). And in my fact table I have field Expense. Then I decided to create calculated fields like "Fruits Expense" -
CASE WHEN Dim."Category" = 'Fruits' THEN Fact.Expenses "."Expenses $ CY" END
There're 2 problems:
A) if the field Category isn't dropped in Answers there're many NULLS (all Exp values which don't belong to 'Fruits')
B) If Category isn't there, there're even more NULLs - which don't look good at all - there're too many empty values
Of course, it's possible to train users to use filters (is not null), etc. - but then it's really not what OBIEE is good at.
Can someone suggest a better approach?
I proposed in the beggining to create fields in the DB like "Expense Fruits" - but ut was deemed too complicated on ETL side.
Thank you and have a wonderful OBIEE day
UPD: OK, I want to rephrase it and make it easier. Except for using "is not null" filter- is there any other way to supress NULL values? I'm getting 12 empty ones and 1 i need. Is there anything I could do in order to supress showing NULL values by default. Thanks
Message was edited by:
wildmight
Message was edited by:
wildmight

Thank you Nilanshu! Where have you been! I'm already seeing quite a few useful contributions. I'll try to go ahead and test your suggestions and I'll report what I've found.
P.S> It works like a charm. Thank you
Message was edited by:
wildmight

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