Reset value cumulativesum

[SASO]

Hi all,

I have a table with a field operation (+, -, S). I would build a DataWindow expression that makes this below.

qta operation total_qta
5 + 5
2 + 7
2 - 5
10 S 10 (NOTE reset cumulativesum)
2 - 8


My compute expression total_qta

cumulativesum(if( operation = '+' , qta,if (operation = '-', qta * -1, if(operation ='S',set comulativesum to value or reset, 0) )) for group 1)


Any ideas?
thanks in advance

[bruce.a...@yahoo.com]

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