Running Total SSRS error

I have an SSRS report that should reflect a running total in the MTD+/- of the Daily +/- column.  When I attempt to do this I get an error stating

The Value expression for the text box 'TextBox12' has a nested aggregate that specifies a dataset scope.  Inner aggregates cannot specify a dataset scope.

Any suggestions?
running-total.PNG
rcowen00Asked:
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Phillip BurtonDirector, Practice Manager and Computing ConsultantCommented:
Can you alter the originating SQL query, and calculate it there using OVER() instead of in SSRS?
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mlmccCommented:
WHat is the formula for the daily total?

mlmcc
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