$ sign String and comaSeperate won't work

I sent this question in earlier but may have included the wrong form in the URL field below.

I'm using the form calculation widget.  It is the calculation for the last field in (Estimated Total PV of Future Savings) the form that is a problem.  The calculation returns the correct answer but the formating is the issue.

The calculation needs to be displayed as $XXX,XXX,XXX.xx.  When I add the comaSeperate command (with the calculation expression within the parens) nothing displays.  Also, sometimes the $string command does not display but the result is prefixed with a $.

I have already responded to your other thread here https://www.jotform.com/answers/1804408 and escalated the issue to our dev team.

Please avoid creating duplicate thread to avoid confusion.