Jump one 1 point. jump 2, 2 points and so on. Joker is either plus 20 or minus 20 depending on wether you clear it.
I think the rules can be rather loose depending on the level of the show, but an Accumulator class is typically run the same way as a Gambler's Choice. Pick your own course, each jump is worth a certain amount of points, and there's typically a joker-type fence at the end that adds to your total if you clear it and subtracts from your total if you don't.