Each mix makes 3 to 6 8oz cups of soup.

1 1/2 cups of soup (12 ounces) is a typical bowl of soup.
A 3 cup mix will make 2 bowls of soup, 12 ounces each.
A 4 cup mix will make 2 1/2 bowls of soup, 12 ounces each.
A 5 cup mix will make a little over 3 bowls of soup, 12 ounces each.
A 6 cup mix will make 4 1/2 bowls of soup, 12 ounces each.