Thanks Peo.
This works fine...
Pierre

Peo Sjoblom wrote:
Try

=SOMPRODUCT((LEFT('nieuwe productie 2006'!G4:G1004,3)="DUO")*
('nieuwe productie 2006'!O4:O1004="afgesloten")*('nieuwe productie
2006'!S4:S1004))

Hi experts,

[quoted text clipped - 12 lines]
Thanks,
Pierre

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