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I need to substract two values of 'Volume' within the following table depending on 'Date' but have no clue how to do that
The logic should be: 'Volume' of maxString(Date,1) - 'Volume' of maxSting(Date,2) [here 20'000-10'000]Date Volume30.06.2009 5'00001.07.2009 10'00003.07.2009 20'000
Has anybody an idea how to do that?
see the attached example (Quantity - Above(Quantity))!
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