How many tomatoes to serve 50 people?

A typical serving of pasta is 2 ounces of pasta and 1/4 cup of sauce. However, most Americans consume more than the standard size. I would double it to 4 ounces of pasta and 1/2 of sauce per serving. Therefore, I'd use 25 cups of sauce to feed 50 people, however, you may want to add another 5 cups just to be on the safe side.