romaine and iceberg lettuce- 4 pounds by weight, maybe some add-ins
salad dressing- 1 1/2 quarts (5-6 8 ounce bottles,) at least Ranch, low fat ranch and Italian

pasta for pasta salad, 2 pounds for 30, 2 1/2 for 40 plus add-ins

loaves of alb french bread 4-5 pounds

Buy good quality tequila and real Cointreau or Triple Sec for best results. 60 margaritas, good quality restaurant style:

10-15 cups tequila (a standard bottle holds 3 cups)(they are strong with the 15 cups)
7-1/2 cups triple sec or Cointreau
6 cups fresh lime juice (you can use bottled, but fresh or frozen is tastier)
6 cups sweetened lime juice (Roses' for example
24 cups ice
kosher salt
60 lime wedges

For each drink measure 2 ounces (1/4 cup) of the margarita mixture into a cocktail shaker. If you have a 2-ounce ladle that you can keep in the pitcher, measuring goes much faster. Add ice cubes (5 cubes for 1, 8 for 2, 10 for 3). Secure the lid and top and shake vigorously for 10 to 15 seconds. Strain into the salt crusted glasses