The paradox of value

123456789101112
Across
  1. 5. An amount of food given to one person at one time
  2. 8. The amount of money that can be received for something
  3. 9. Not having the normal amount of water in your body so that you feel ill or weak
  4. 10. The things you must have for a satisfactory life
  5. 12. A situation or statement that seems impossible or is difficult to understand because it contains two opposite facts or characteristics
Down
  1. 1. Feeling as if you are going to vomit
  2. 2. A person who studies or has a special knowledge of economics
  3. 3. The usefulness of something, especially in a practical way
  4. 4. Necessary for the success or continued existence of something; extremely important
  5. 6. Something difficult or unpleasant that you have to deal with or worry about
  6. 7. A fact or event that makes a situation the way it is
  7. 11. To walk around slowly in a relaxed way or without any clear purpose or direction