Chat report: Good tip on how to create a standard report with user operating system and browser?

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Attached Report Definition.jpg shows the expression and filters I wish to use in the report, all good there.

If I run the report as is today, it shows all the records within a given timeframe (report.png).

But the problem is, how do I create this as "total report"? Where the expressions are shown as total - and not individual as is does now?

Any tips or guidance would be at a great help!