60 Turkey sandwiches-
mini croissants,
3# cream cheese with 2c cranberry mustard, 2 pounds is plenty
8# shaved turkey.

60 roast beef or ham sandwiches-
rye cocktail bread,
6C horseradish mayo, 4 plenty
4# cheese, plenty
5 pounds deli slice meat

Condiment trays- suggest instead you do one classic relish tray from the veggie tray page, with just 16 ounces, pint each, of the 2 mustards and the horseradish sauce
6 heads lettuce, skip
8# tomato,
1gal olives, pickles & peppers.
32 oz each yellow & dijon mustard.

green, greek, potato & macaroni.
potato salad , 20 pounds potatoes plus add ins
pasta salads, 5 pounds dry pasta plus add ins. The pasta salad is particularly inexpensive and easy to make at home.

She might prefer the Greek Village salad, no lettuce, here, do 1/2:
www.ellenskitchen.com/bigpots/plan/salads1100.html#greeksaladcrowd
Then do a Romaine salad, just 5 pounds, as the green salad, 1/2 the amount for 100 from the plan for 100 page
2-3 fruit platters for 25 ? Yes, and you can do these at a much lower cost, use the fruit tray page- about 6 bites per person.

5 gal water,
3.5 gal each iced tea & lemonade, I would plan on 5 gallons each-
Simple syrup & lemon wedges