There wasn't any 'charter plus' concept on the flight. The info on the SAS pages you qouted is incorrect I'm affraid. The only differance was if you had pre-ordered food or not, the charge for that was 160 kr (r/t) for adults and 80 kr for children. The only drinks included for adults was coffee/tea and for children juice - for those who had pre-ordered food. All other drinks you had to pay for according to the cloud shop price list for charter flights. The cabin crew were discussing if they should charge an EBP for drinks or not and concluded that they shouldn't.