The Cheddar cheese would run about 180 Baht, the Colby or Edam, another 90, the condensed soup about 90 Baht, same for making yourself but you will know what is in it. For 10 servings, this is about $1.06 per serving.
Shortcut: Condensed Cheddar Cheese Soup.
Variants: Add chopped broccoli, chopped ham, cooked cubed chicken.
Adapted from an internet recipe.