In Whack and Hack, the four team members each play their own ball for four individual scores. Two of those scores are combined to make up the team score on each hole. The two scores that are used are the low ball and the high ball. So if the four players score 4, 5, 6 and 7, respectively, the team score is 11 (4 + 7).
But there's an exception. If the low ball for the team is a birdie or better, then the team gets to use its two low balls on that hole.

