8 slabs will be about 96 ribs or 32 sets of 3 (50 bucks?
pork will make 20 4oz sammies (10 bucks)
1 dozen quarters is, well, 1 dozen. I'd consider parts, making 20 so everyone has one for an option. Maybe thighs. Or 20 quarters. (20 bucks??)
I'd take to the cost of the meat, add the cost of the coal (10 bucks), and triple it (~270 bucks). Scott