Cost calculations

ar-no-rails.rb

@@ -1,6 +1,7 @@
 require "rubygems"
 require "bundler/setup"
 require "active_record"
+require "open-uri"
 
 project_root = File.dirname(File.absolute_path(__FILE__))
 Dir.glob(project_root + "/app/models/*.rb").each{|f| require f}