How do I filter the following data to give me the total for each client under
the cumulative total of 21:00 hours.

A B D E
Date Client Hours Total
hours(cumulative)
5-Sep-07 A 5:20 5:20
7-Sep-07 B 5:15 10:35
8-Sep-07 A 10:05 20:40
9-Sep-07 B 0:35 21:15
9-Sep-07 B 7:40 28:55
9-Sep-07 A 0:15 29:10
10-Sep-07 A 0:15 29:25
and so on.....


Regards

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capt