Convert PowerPoint Slides to PDF's

Hello,
I have 20 PowerPoint documents each with 12 to 14 slides.
I would like each of these slides to be saved a separate PDF's with same aspect ratio as the slides, which is square.
So each PowerPoint would result in 12 to 14 PDF's
This could be done manually or automated.
Each PDF should be saved with the name of the document and then with the slide number. E.g. DocumentA_1.pdf, DocumentA_2.pdf.
I have attached a sample PowerPoint document without any content in each slide to give an example of how I will supply the PowerPoint documents.
This is not creative work but I have tried and I don't have time to do it manually.
Can you quote for this work and let me know when I can have the output PDF's please
Thanks, Peter