I would use 25 pounds of fresh green beans for 100 people
5 grams
10
Lennie and George share one can of beans.
I would NEVER feed guests canned beans. -Fresh are tastier, healthier and only a fraction more costly.
a 10 lb can of green beans will feed 50 people with 3 oz portions.
The cans are 14.5 oz in weight, not volume. My can says it has 3.5 servings at 1/2 cup (volume!) per serving. So 1.75 cups per can. 8/1.75 = 4.5 cans. So 5 cans of green beans to make that double batch of green bean casserole.
Without knowing what kind of dish you are serving the red beans in, this will be an estimate. For straight red beans, served as a side dish, you can estimate that each person will eat approximately 1/2 c of beans. For 150 people, this is 75 cups. Each can tends to have about 1 cup worth of beans in it, so you would need 75 cans of red beans.
Obviously Sam's is the better deal.
The type of food that can be put in cans is non-perishable food items such as dried food but also foods such as Tuna, Baked Beans, and Soups. Cans are great for keeping food fresh even if it is not stored in a fridge.
My guinea loves peas and also green beans she oes crazy when she hears me opening the cans and also she loves corn
I would use 150 cans