/Users/ryan/Sites/gems/spree/core/app/models/spree/calculator/per_item.rb:1:in `<top (required)>': uninitialized constant Calculator (NameError)
	from /Users/ryan/Sites/gems/spree/core/lib/spree/core/engine.rb:31:in `block in <class:Engine>'
	from /Users/ryan/.rvm/gems/ruby-1.9.2-p180/gems/railties-3.1.1.rc2/lib/rails/initializable.rb:29:in `instance_exec'
	from /Users/ryan/.rvm/gems/ruby-1.9.2-p180/gems/railties-3.1.1.rc2/lib/rails/initializable.rb:29:in `run'
	from /Users/ryan/.rvm/gems/ruby-1.9.2-p180/gems/railties-3.1.1.rc2/lib/rails/initializable.rb:54:in `block in run_initializers'
	from /Users/ryan/.rvm/gems/ruby-1.9.2-p180/gems/railties-3.1.1.rc2/lib/rails/initializable.rb:53:in `each'
	from /Users/ryan/.rvm/gems/ruby-1.9.2-p180/gems/railties-3.1.1.rc2/lib/rails/initializable.rb:53:in `run_initializers'
	from /Users/ryan/.rvm/gems/ruby-1.9.2-p180/gems/railties-3.1.1.rc2/lib/rails/application.rb:96:in `initialize!'
	from /Users/ryan/.rvm/gems/ruby-1.9.2-p180/gems/railties-3.1.1.rc2/lib/rails/railtie/configurable.rb:30:in `method_missing'
	from /Users/ryan/Sites/gems/spree/core/spec/dummy/config/environment.rb:5:in `<top (required)>'
	from /Users/ryan/Sites/gems/spree/core/spec/spec_helper.rb:4:in `require'
	from /Users/ryan/Sites/gems/spree/core/spec/spec_helper.rb:4:in `<top (required)>'
	from /Users/ryan/Sites/gems/spree/core/spec/controllers/spree/admin/mail_methods_controller_spec.rb:1:in `require'
	from /Users/ryan/Sites/gems/spree/core/spec/controllers/spree/admin/mail_methods_controller_spec.rb:1:in `<top (required)>'
	from /Users/ryan/.rvm/gems/ruby-1.9.2-p180/gems/rspec-core-2.6.4/lib/rspec/core/configuration.rb:419:in `load'
	from /Users/ryan/.rvm/gems/ruby-1.9.2-p180/gems/rspec-core-2.6.4/lib/rspec/core/configuration.rb:419:in `block in load_spec_files'
	from /Users/ryan/.rvm/gems/ruby-1.9.2-p180/gems/rspec-core-2.6.4/lib/rspec/core/configuration.rb:419:in `map'
	from /Users/ryan/.rvm/gems/ruby-1.9.2-p180/gems/rspec-core-2.6.4/lib/rspec/core/configuration.rb:419:in `load_spec_files'
	from /Users/ryan/.rvm/gems/ruby-1.9.2-p180/gems/rspec-core-2.6.4/lib/rspec/core/command_line.rb:18:in `run'
	from /Users/ryan/.rvm/gems/ruby-1.9.2-p180/gems/rspec-core-2.6.4/lib/rspec/core/runner.rb:80:in `run_in_process'
	from /Users/ryan/.rvm/gems/ruby-1.9.2-p180/gems/rspec-core-2.6.4/lib/rspec/core/runner.rb:69:in `run'
	from /Users/ryan/.rvm/gems/ruby-1.9.2-p180/gems/rspec-core-2.6.4/lib/rspec/core/runner.rb:11:in `block in autorun'