ham, 1 pound per 6
turkey , 1 pound per 5
meatballs, 10 pounds per 100, 3 quarts sauce per 10 pounds
I am assuming the ham and turkey are deli sliced, not whole bone in.

perlo rice dressing , start with 12-15 pounds rice (depends on appetites) and make some meatless rice pilaf for any vegetarians attending
corn, 28 pounds ready to serve
green beans, same

potato or pasta salad , with the rice do only 1 and do for 100, using quantities from one of my recipes for 100

rolls 16 pounds (or do 5 standard size or preferably 10-12 slider rolls for each pound of sliced meat if planning sandwiches

salad use plan for 100 table, 1 1/2 times

fruits, use fruit tray page, the deluxe tray for 100 would be about right if you are having cake for dessert

You can also consult the beverage planning page , and the sandwich page for condiments.