How can I make a field that will convert numbers into dollar amounts?

When someone fills out a loan amount, I want it to show as dollars with a dollar sign and proper spacing. 

(Ex. someone input 250000 in the provided form and the info should show as $250,000 dollars)

How do I do this and what tool should I use?

Thanks for asking. We have a Masked Input widget which should fit your requirements. (Please see this guide.)

Do inform us if you need further assistance.

Thanks