How do we copy filled multiple choice widget value into a short text field and separate the content with comma?

Hi, I would like to copy my Multiple Choice widget into a short text field, but I cannot seem to separate the content with comma (multiple choice field are words, not decimal). I tried using this formula but I cannot seem to make it work. How do we separate autopopulation with a comma?

Hi CS_Bumame,

Thanks for reaching out to Jotform Support. Can you try to use the copy field value instead. It will automatically add a comma as a separator. Check out my screenshot below:

Check out my screencast below for the results:

Give it a try and reach out again if you have any other questions.