I understand that if you want to hire a writer to write an episode there are certain minimums set, like $15k for a 20min sitcom story plus teleplay. But, what if there are multiple writers writing a single episode, what happens then? Do both writers get $15k?
If multiple writers have written a script they are "considered a unit" and get paid as if they were one person.
If more than one writer shares the story or teleplay credit, then all of the writers sharing each credit shall be considered a unit and shall participate equally and receive in the aggregate the theatrical exhibition payment applicable thereto, except that in the case of a comedy-variety program, the Guild shall determine the proportions in which such participating writers will share the theatrical exhibition payment, will notify the Company thereof and Company will make payments accordingly.
~ Writers Guild of America 2014 Theatrical and Television Basic Agreement