How much is a Star Wars credit worth in USD?

Excuse me, could you possibly shed some light on the matter of converting Star Wars credits into United States Dollars? I understand that this may be a somewhat unconventional query, given that Star Wars credits are purely fictional, but I'm curious as to whether there's any established methodology or convention for determining their supposed worth in real-world currency. If there's any information available on this subject, I would greatly appreciate it if you could provide me with a concise yet informative answer. Thank you in advance for your time and assistance.