menu Polish sausage (150 pieces) at least 25 pounds
cocktail meatballs (650) 3 quarts sauce per each 10 pounds
*Add crusty rolls that could be used for a meatball or sausage sandwich- 1 larger or 2 small per person
3 pounds butter
consider squirt bottle each spicy and regular mustard
consider adding 10 pounds deli sliced ham or other cold cuts

potato salad (30 pounds)- OK, none left, might go 35

garden salad (broccoli, cauliflower,grape tomato, black olives, red onion in oil/vinegar/ranch sauce)20 pounds
100 people generally don't eat more than 12 to at most 15 pounds. Suggest you put the marinated onions on the side, not everyone can eat them

You might add 2 gallons of an interesting specialty salad- 3 bean, broccoli slaw, Texas caviar, etc

fruit bowl, watermelon, strawberries,cantaloupe,blueberries other in season (20 pounds)- might increase a little, to 25

cheese cube, green olive, black olive pickle tray.
2 gallon pickles, - usually 1 gallon is enough
gallon each olives - fine to go for about 1 gallon total
4 lbs cheese cubes -I usually do 8-10 pounds for 100 people.