Delete non PDF files from zip files

I have 1,169 .zip files that contain PLR products such as ebooks and images and other files. You will need to download them via FTP and re-upload them when you are finished. The total file size of all the files together is about 3 GB. I have all the files ready for you to download and would like to pick a freelancer for this project today. I need you to go through all the zip files and delete all files that are not the actual product file. I only want product files that are .PDF files. If the product file is not a .PDF file (for example: .exe or .mp4) you should delete the entire zip file because I don't want that product. Here is an example: zip file name: [login to view URL] zip file contains: (folder) Cover (folder) Sales Letter (PDF) E-zine [login to view URL] (PDF) MMR [login to view URL] You would need to delete everything EXCEPT (E-zine [login to view URL]) because that is the product file. Notice that MMR [login to view URL] is also a .PDF file. But I don't want that one because it is not the ACTUAL product file. You will need to figure out which .PDF is the product file in each of the .zip files. Please note that the product file for each .zip file is not located in the same place in each .zip file. Each zip file MUST be saved with its original name. So in the example above the zip file would need to be saved as [login to view URL] When you are finished, each zip file should contain only .PDF files. It is ok if a zip file contains multiple .PDF files but ONLY IF they are actual product files. When you are done I need you to upload all the zip files to an FTP server I will give you log in details for. I have uploaded 3 test .zip files so you can show that you are able to complete this job as requested. Please download it and follow the above steps on the .zip files, then Private Message the completed files to me as a zip file. Please do this when you bid because I need to know you are able to follow the instructions before I can award you the project. Please don't bid more the $50 for this project, it's all I can afford to put towards it. Thank You!