From the back-half of the Ambiguously Unspecific Duo:
Huffington Post: “The Obama campaign has blasted the Romney-Ryan ticket for not providing details on how it would give Americans such large tax breaks without growing the deficit. Ryan reiterated in an interview on “Fox News Sunday” that the plan would drop taxpayers’ bills by 20 percent without costing a dime, due to closed tax loopholes, but he was short on specifics when pressed by host Chris Wallace.
“You haven’t given me the math,” Wallace said in one exchange.
“I don’t have the … It would take me too long to go through all of the math,” Ryan responded.”
Just take their word for it.