sausage, 2-3 pounds, or how about sliced turkey?
meatball, about 4 pounds
roast beef , deli thin slices, assuming cold, about 4 pounds
sandwiches, small hero rolls or baguette would be a very good choice for one of the breads. About 1 pound bread/roll for each 6 people.

cheesy potatoes, use recipe at the bottom of the breakfast planning page for amounts

garden salad 1/2 the amount for 100 on the plan for 100 page

Suggest also you add 1 1/2 gallons of a interesting dish such as a cold bean salad, corn relish or fruit tray.