Herman Cain's 9-9-9 plan: What would your sales tax be?

Herman Cain's 9-9-9 plan: What would your sales tax be?:

Herman Cain has vaulted into the top tier of GOP presidential candidates with his 9-9-9 tax plan, which would create a new 9 percent federal sales tax. But consumers would have to pay that sales tax on top of existing state and local sales taxes. Here are figures from the nonpartisan Tax Foundation that look at the total sales taxes in every state, adding up the state sales tax, a statewide average of the various local sales-tax rates, and the 9-9-9 federal sales tax.