I'd go with 25# of raw butts, 9-10 racks of ribs (St. Louis cut), and 20# of leg quarters. That should give you about 50 4oz pulled pork servings, about 90-100 bones of ribs, plus the leg quarters.
48 pieces of chicken mixed, leg, thigh, wing and breast. 25lb. of pork butt smoked and hand pulled (I perfer using this tool, http://www.katbbqsmokers.com/porkinator/) with fat separated will yield one full disposable pan approximately 18lb once sauce is added. Ribs, I would do 8 racks of St. Louis which will yield 80 ribs. You will have left overs.