[kohanmike]

That worked, thank you very much. The terminology is, "In the Dock, click once on the Finder icon to open a Finder window, In the left navigation column, click once on the iPad. In the section to the right, click once on the Files tab. A list of iPad apps will show, including MobileSheets. Drop the PDF files and mp3 files on the MobileSheets icon. When copying is done, pick up the iPad and in MobileSheets, choose import>Local Files and choose the MobileSheets icon."

Note: the audio import seems to not recognize apostrophes.