Storing embedded data in desired format

I built an embedded data element that is summing table matrix values and answers will be in the thousands. When I display the value in a later question, I was hoping to display "3,857" rather than "3857". Is this possible? I found reference to storing embedded data with formats on a previous post, but no details on how to do this and when I look at the option, I can set it to a number format, but that does not bring any formatting options.