Tariff points, please help!?

For my course, i have already been offered a conditional. But on it, my course requires a minimum of 220 tariff points, CC grades at A-Level (including 2 science subjects). i tried to look up the grade requirements for 220 tariff points but one of the tables says its AB (although i may have been looking at the wrong column) which makes no sense to me and i searched the internet and one guy had said it was a CCD. please help someone, cause all of this is rather confusing me :(