"about 20 (British) cents per unit (or 30 percent)" Britain doesn't use cents, the linked article used cents without clarification, so it may be US cents?, or

"about 20 (British) cents per unit (or 30 percent)" Britain doesn't use cents, the linked article used cents without clarification, so it may be US cents?, or possibly Euro cents??, I don't know where the 30% came from, because I couldn't find that mentioned in the linked article either.