They don't want us (the dealers) to edit the spreadsheet, but they do want us to read it. It's their pricelist, they wouldn't sell a lot of equipment if we couldn't see how much it costs! The point is that Numbers won't even open a spreadsheet that is edit protected, not read protected. This is a major issue, it should at the very least tell me I can open or import the sheet as a read only.
Excel will always open the spreadsheet, it just can't make changes to it.
For right now, when I need to get information from the pricelist in Excel, I have to copy and paste the info from the edit protected page to another blank sheet. This is a royal PITA because the Excel pricelist has 50 plus pages. I have been officially told to do that by my manufacturer. But they won't give anyone the password to unprotect the edit function of the sheet. Go figure.