Is there a way to set up credit card charge but with no $ amount entered?

Is there a way to set up credit card charge but with no $ amount entered? I want their credit card info and after I figure out total (it could be a few days later) I could fill in the amount and process it.

Unfortunately, collecting a credit card information using our plain text fields is not allowed. You may consider enabling the payment authorization to charge customers at a later date: https://www.jotform.com/help/292-How-to-Enable-Payment-Authorization.