1 pre cooked pound of pulled pork is a good starting point.
Brisket, I'd guess about 3/4 lb of pre cooked meat/person.
I usually figure 1/4 lb cooked PP per person at 40% loss.
Brisket depends on how you trim. I'd say you'll be at a similar loss?
Big JT's Smokin' BBQ Competition Team
"The path was worn and slippery. My foot slipped from underneath me, knocking the other out of the way, but I recovered and said to myself, 'It's a slip and not a fall.'"