Use amount in receipt as part of new file name

Hi all. I've finally said, "Self, you've been pulling dates from documents and using them in file names for years. It's time to do the same thing with the actual amounts in receipts."
But.... I'm stuck. "Contain match" gives me a variable name for a date.
I can't find / or don't know how to do the same thing for a chunk of data, that I can find, but not name!
Can someone please provide me with direction?
Thank you much in advance! Joe
But.... I'm stuck. "Contain match" gives me a variable name for a date.
I can't find / or don't know how to do the same thing for a chunk of data, that I can find, but not name!
Can someone please provide me with direction?
Thank you much in advance! Joe