Tish cons the others into spending the weekend helping her do science experiments so she can win first prize in an essay contest. Tish uses a friendship scoreboard, showing all the favours she's ever done for them, to convince them they should help her. They do a couple of experiments with her but then decide they've had enough. They make up their own friendship scoreboard showing that Lor only owes Tish 2 favours, Tish owes Tino 4 favours, and Craver owes them all about 150 favours. Tino claims his 3 of his 4 favours so he Lor and Carver can spend the rest of the weekend playing pool. Tish gets annoyed at them for ditching her, until she realises that friends do favours for each other because they want to, not because they own them and if is she had of just asked them nicely in the first place, instead of using a favour scoreboard, they probably would've helped her.
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