Hi
=Sumproduct((Oldsheet!$A2:$A100=$A2)*(Oldsheet($B$ 2:$B$100=$B2)
*(OldSheet$C$2:$C$100=$C2)*$D2:$D100)

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Regards
Roger Govier

"FARAZ QURESHI" wrote in message
...
I have to update a list of clients every week as per the following format:
Column A Branch Code
Column B Account Number
Column C Product Code
Column D Amount

Now, every week when I receive a new list I need to fist enter a formula
in
COLUMN E in the old sheet as =+A2&"-"&B2&"-"&C2 copied in all the rows and
then workout the account-wise differences by entering the following type
of
formula in the new sheet's COLUMN E for former amounts:

=+IF(ISNA(VLOOKUP(A2&"-"&B2&"-"&C2,OLDSHEET!$E$2:$E$10000,1,0)),"",SUMIF(OLDSHEE T!$E$2:$E$10000,A2&"-"&B2&"-"&C2,OLDSHEET!$D$2:$D$10000))

so as to calculate the total amount pertaining to the respective branch's
client's said product.

Any idea how to shorten such a formula and carryout a similar exercise
without creating the EXTRA COLUMN "E" in the Old Sheet, i.e. inserting
formulas like:

=+A2&"-"&B2&"-"&C2?

Thanx in advance,

Best Regards,
FARAZ A. QURESHI