I don’t know what you are reading, but none of those things are sales tax deductions under Cain’s plan and he reiterated that in the interview.
Again, this part of Cain’s plan has been hashed out for years by the Fair Tax folks. http://www.fairtax.org
I know that. All of the items I listed, including food, will be taxed under the 9-9-9 plan. In fact his website doesn't list any exemptions to the sales tax, not even used items. So it's hard to know what exactly will be taxed since his website says one thing and Cain has different versions of what he will tax and what he won't.