Amounts needed for feeding a group of 100

Sheila Wolf shares her knowledge and ideas of how much it takes to feed a crowd.  These estimates can help avoid under- or over-buying for an event and are based on her many years as a wedding caterer, foods teacher and feeder-of-crowds.

Nuts: 3 pounds
Mints: 3 pounds

Chips:  4 pounds
Dip:  3 pounds

Sandwiches
Bread: 14 loaves
Small buns:  125 or 8 pounds
Sliced Meat:  8-10 pounds
Barbeque:  9-10 pounds

Hor D'oeuvres

Vegetable tray: 
2 heads broccoli, 1 head cauliflower, 2 pounds carrots, 1 bunch celery, 1 pound radishes, 1 pint cherry tomatoes, 1 pepper

Cocktail sausages
Use lil' smokies or quartered hotdogs - 3 pounds serves 100
1 20 oz. can pineapple
2 cups catsup
1 cup brown sugar
1 T. Worcheshire sauce

Source

Watermelon Basket
1 watermelon
2 cantaloupe
1 honeydew melon
2-  20 oz cans chunk pineapple
1 quart strawberries
2 pounds grapes
Do not use apples or bananas - they brown and get soggy too quickly

Cut up fruit ahead of time and store them separately in zipper bags or tupperware.  Do not mix until time to serve.

Beverages

Punch
4 gallons koolaid
1 gallon pineapple sherbet
1 can pineapple juice
4  2-liter bottles of ginger ale, sprite or other clear pop

Coffee
1/2 pound of coffee grounds makes 30 strong cups
I would use 1 pound for 100 cups

Iced Tea
50 individual tea bags makes 5 gallons of strong tea.
Add 2 gallons of ice