sum by group

Hi muelledg 

Perhaps the request was not clear enough in my previous reply.

We need to know what data is being used in the measure you are having problems with (not limited to relationships between tables). Based on the screenshot, we are not sure [summary] [index] [hours] correspond to which fields in your actual data.
Please share your pbix file if you don't mind. This is the quickest way for us to understand your problem. Alternatively, please provide the dummy data in tabular form that maintains the same data structure as the three actual data tables.

Thank you for your understanding.

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Best Regards,
Jarvis Tang
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