SSRS Nested SUM ( IIF Expression Need to Group By Date Please Help

[AW1976NOVA]

I am new to SSRS and have a SUM(IIF question.

My data set contains four columns: Date, GroupID, PlanPaid, and NetworkIndicator.

Here is an example of the data set:

I am trying to SUM the [PlanPaid] amount when [NetworkIndicator] = "In Network".

However, I need this amount broken up by the [Date]. I tried accomplishing this by creating the expression:

=Sum(IIf(Fields!NetworkIndicator.Value = "In Network" , Fields!PlanPaid.Value , Nothing) , "Claims_Rolling12")

But this expression returns the same amount across all [Dates]:

How do I break it up so that it is grouped by the correct [Date]?  I want it to return this:

[AlexisOlson · Accepted solution]

Adding the "Claims_Rolling12" argument means that it's summing over that context instead of just the local context.

In this case, I think you can stick with just Sum(Fields!PlanPaid.Value) and put a NetworkIndicator filter on the entire Tablix.