Depends on the people. If teenagers, about a package each
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5 pounds of macaroni should be enough to feed 20 people. Depending on appetite each pound can feed between 4 and 5 people.
Found this great recipe. It will give you an idea of how much mac and how much cheese.
Kraft Macaroni and Cheese is a boxed dinner that comes with a powdered cheese packets and raw macaroni. At Walmart, a single box of Kraft Mac and Cheese sells for a little less than 1 USD.
To make a large cheesy potatoe casserole for 150 people I would use between 50 and 60 pounds of potatoes which would be about 180 individual potatoes or five to six ten pound bags of potatoes.
If all 210 people are eating exactly 1 serving, it will cost around 6,930 cents or $69.
I doubt that very much. For one thing why would the makers waste that money.
I don't think so but, Kraft Mac and Cheese has different size boxes.
For 200 people, you'd need around 3 gallons of macaroni salad.
I think 4 ounces is enough as a side. That would mean about 38 pounds of mac'n cheese.
I would make 12 pounds IF it is a side dish, or about 35 pounds if it is the main dish.
About 25 cups