Hey Stan, check out Intl.NumberFormat, it’s purpose-built for this.
I just tripped over a solid answer @webdev wrote on this also.
@Aaron_LeBlanc any time you’re wanting to do things Webflow does not have in-built support for, you will probably use script to create the behavior you want. It’s best to learn how to do this. For now, you’ll at least need to learn how to install it;
Stan’s code will format your numbers but you need to learn how to target it to the right elements, so that you’re formatting the right things. If you share a read-only link to your project we might be able to help you figure that out.