I need a simple, inexpensive pdf editor.

Been googling for an hour looking for a fairly inexpensive pdf editor. One in which I can change info on a pdf, or fill in blanks on a pdf. I volunteer for food pantry and do a lot of the paperwork, We keep getting documents where we have to fill in information. Also we need to update already existing pdfs to send to agencies who support us.

Is there a fairly simple inexpensive pdf editor out there that any of you tech savvy folks would recommend. I don't need photo imaging, editing etc. Just document editing. I have Word.Thanks in advance.