When cooking ribs at family gatherings and other functions, I cook whole slabs, no St. Louis or Memphis cuts. If cooking ribs only, I figure half slab per person plus 3 slabs extra for the pit. It always works out fine with maybe a slab or 2 left over for me,,lol. $15 a slab on reunion/gatherings. Anything else they go for $18 like everyone else charges for catering or vending.
"If it ain't from Dixie, it ain't real 'Que"