Hi @IDOT_jrm,
To display the thousand separator you could use the appearance thousands-sep (available in Collect v1.12+ for integer, decimal and string number types). See Automatically generate commas in value fields for every 1000 - #5 by Frances
If you are interested in displaying the USD symbol, a work around could be to display the result in a new variable, type note, Including in the label the "$" symbol followed by the variable with the amount entered by the user.
Best,
Andrea