My ECON Puzzle

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Across
  1. 1. the extra cost of adding one unit
  2. 7. a person or persons who studies economics
  3. 9. a person who decides how to combine resources to create goods and services
  4. 11. the effort people devote to tasks for which they are paid
  5. 13. physical objects that someone produces
  6. 16. the extra benefit of adding one unit
  7. 18. principle that limited amounts of goods and services are available to meet unlimited wants
Down
  1. 2. most desirable alternative given up as a result of a decision
  2. 3. the actions or activities that one person performs for another
  3. 4. when consumers want more of a good or service than the producers are willing to make at a particular price
  4. 5. the act of giving up one benefit to gain a greater benefit
  5. 6. a phrase to produce more military goods
  6. 8. any human-made resource that is used to produce other goods and services
  7. 10. the study of how people seek to satisfy their needs
  8. 12. a phrase that has fewer resources to produce consumer goods
  9. 14. something that people desire but is not necessary for survival
  10. 15. something essential for survival
  11. 17. all natural resources used to produce goods and services