How to subtract records from the same field in Report Viewer?

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The following report, brings the following query:

In the report, how can I subtract the amount? When I try to put a TextBox and put it in this way it gives error: = (Fields! MONTO.Value - Fields! MONTO.Value, "dsEstadisticos")

    
asked by Jose Angel 08.03.2018 в 15:35
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0 answers