...in the $50 billion to $60 billion range:
http://business.time.com/2012/10/31/hurricane-sandy-estimated-to-cost-60-billion/
http://www.cbsnews.com/8301-201_162-57543923/damage-from-sandy-could-cost-as-much-as-$50b-says-forecasting-firm/
http://www.smh.com.au/environment/climate-change/cost-of-sandys-fury-may-top-us50b-20121103-28qdk.html
http://www.thedailybeast.com/articles/2012/11/02/as-much-of-new-york-and-new-jersey-remain-paralyzed-and-devastated-the-costs-from-sandy-continue-to-climb.html
http://money.cnn.com/2012/11/02/news/economy/sandy-economic-impact/