Hi @Patrick Wong ,
If I understand correctly, the total you need to calculate should be 29000 (10000+4000+15000). Are there any groupings in your report? What is the report structure? How did you get this 37000 value?
If it is possible, please provide testable data as much as possible.
You could also check the following official documents: Add a Total to a Group or Tablix Data Region (Report Builder and SSRS).
Lesson 6: Adding Grouping and Totals (Reporting Services).
Best Regards,
Joy
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