That script is all very well. But if you buy things from the same place regularly then you will have a number of PDFs with very similar names.

You can add an extra step before it to rename the PDF. Do a search for “rename” you should get an option to rename finder items. Drag that step before the current one to create a new folder.

You will then need to customise it.

By default it will append the current date to the end of the file name, but before the file extension.

You can use this for other things that you save regularly too.