How can thousand separators be built into a concat() statement in a beast mode for a custom summary?

I found Creating a Custom Summary Number in the Knowledge base on https://domohelp.domo.com/hc/en-us/articles/360043430093-Sample-Beast-Mode-Calculations-Card-Element-Transforms.

I have built a custom summary number with the below beast mode that results in "75740929.28 Part Sales Net - February"

Is there html code or perhaps a series of string statements that can put commas into the numeric part of my summary? The knowledge base suggests it is possible but does not give a clue as to the method.

CONCAT( SUM(`total net sales`), ' Part Sales Net - ', MONTHNAME(MAX(`invoice date`)))

I would appreciate anyone sharing their solution.

Thanks