I dowloaded a standard price list utilized by builders, electricians etc., however I am unable to edit same. What can I do
To edit a PDF file, you can use Adobe Acrobat XI. Or you can use Adobe ExportPDF to convert the PDF to an editable format (like Word). You cannot edit PDF files with Workspaces (which is the forum you posted in).
Note that not all PDF files are editable - even with Acrobat or ExportPDF.