Pdf en excel : solution ?

Hello, I have several PDF invoices that I'd like to process using a spreadsheet. I can't find an easy way to convert the PDFs to Excel. The invoices can be up to 80 pages long and include equipment numbers, serial numbers, and either a fixed rental cost or a cost per page (they're printer invoices). I have Adobe Acrobat Pro, but I don't see how I can use it to solve this problem. Is there a way to work with Excel? The invoice data isn't in a table format.

Thank you.