RTC v6.0.4: Create Short String Cost Field for Currency
Accepted answer
I don't think you can "re-format" a string by using an editor presentation. Your best bet is to use the Decimal attribute type and the Decimal presentation. I can't find a way to put the dollar sign right next the text box. You may need to use a validator to force users to use at most two digits after the decimal point, or you can try to use the script to round it up automatically.
Comments
No, you could either use a validator, or you could use another attribute where you generate the output as calculated value. The second one would just be read only the first one the value to enter.
Another option would be to create a custom attribute presentation which is very expensive and I would avoid that.