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.
The only deduction he has said, when discussing the details of the plan, is under sales tax is “used” items, and under income tax “charitable contributions”.
You are right, not all the details are not listed on the brochure you linked to - because it is a KISS principle.
He plans to roll out his detailed version in the near future so I am sure that will answer a lot of questions.
Even then, I am sure Cain is also going to tweak the plan as time goes on. He is talking and LISTENING to a lot of brilliant minds out there on this as well as what the people say.