Group data by two column with a sum on the third column

I have this data set which needs to be grouped by data in the first two columns, but also with a sum within each grouping.

The attached file has a before and after.

Hi -

Also try;

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Regards,
Event

try

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Hi Jindon -

Nice approach

much faster by 1.5 seconds running a test of 500000 records compared to mine.

Regards,
Event

Thank you to all...the solutions are great.