Unless they are very large, I would do 1 chicken and 1 1/2 to 2 beef per person and about 10 with a veggie or cheese filling of some kind for the non-meat eaters.

Veggie tray and fruit tray, see the respective pages.

Devil 3 dozen eggs.

A 2 layer or 9x13 cake serves 12. If ordering from a bakery, a sheet cake or 2 layer half sheet cake would serve 50.

Consider adding some kind of chips and dip - 1 pound chips per 10 and 3 cups dip per pound. Could be pita chips and hummus, salsa and tortilla, etc.