Quote:
Originally Posted by Quilp
Thanks Claus. Could you kindly simplify your suggestion for me because I am a novice user of spreadsheets and at the moment your reply has baffled me!
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I have had another thought Claus. The values I wish to ignore are ignored because they are not valid until a certain date is reached after which they can be included in the summation. Is there an alternative solution to my problem bearing this in mind?