NORA O'DONNELL: “YOUR AGENDA HAS PROMISED FREE HEALTH CARE FOR EVERYBODY, FREE COLLEGE TUITION, AND TO PAY OFF PEOPLES’ COLLEGE LOANS. THE PRICE TAG FOR THAT IS ESTIMATED TO BE $60 TRILLION DOLLARS OVER TEN YEARS. IS THAT CORRECT?“ "YOU DON’T KNOW HOW MUCH YOUR PLAN COSTS?”; BERNIE: “YOU DON’T KNOW. NOBODY KNOWS. THIS IS IMPOSSIBLE TO PREDICT”