This truly is more for my reference than anything else, but I hope it helps you out.
3 two lb bags of salad mix from Sams club will feed 90-100 people (or will fill 100 4-oz bowls). You also need to work in that ~30% of the people/kids that go through the line will not pick up a salad.
A #10 can of corn says it has 24 1/2 c servings. A normal single spoon ful is closer to 1/4 c so I assume 48 servings. Plus some people will pass so I round to ~60-70 people per can of corn.
3 #10 cans of fruit cocktail will give you ~100 1/4 c servings. We normally gave the option between fruit cocktail and salad.
