How much will it cost to go to Mars?

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  1. #billion
  2. #first
  3. #combined
  4. #hardware
  5. #mission
  6. #operations
  7. #costs
  8. #estimates
  9. #bringing
  10. #expenditures
  11. #every
  12. #including
  13. #operational
  14. #manned
  15. #people
  16. #margins