Just returned from the October 17th sailing of the Carnival Liberty Eastern Caribbean sailing.
Cast of characters: Me, age 43. Husband, age 49. Two teen daughters, ages 15 and 17. We had two cabins. The teens were in cat 1A, cabin # 6227 and hubby and I were directly across the hall in a Cat 8 balcony cabin, 6225.
Total cost: Balcony cabin $750 pp, which included all taxes and fees. Interior cabin was $500 pp, including all taxes and fees. We spent about $900 on board on drinks, photos, bingo, etc... (not counting the "contributions" we made to the casino.) We also spent about $800 on shore excurisions, which I'll discuss below.