Any month with some credit (CQ VAC etc.) will put you above guarantee and reduce your on call days.

December with 8 days of vacation was 81:25 with 13 days on call with an extra X day. ALV and guarantee were 72. I actuallly worked 8 days and 1 SC.

January with CQ is 76:48 with 13 days on call but the day after the sim is ussually rest so 12 practically. ALV and guarantee is 72. So far all I've done this month is CQ. No shortcall or flying yet.