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drewtempelmeyer/gist:4129411

Created November 22, 2012 04:25
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gistfile1.rb
result = @transaction.lookup[:lookup_response][:lookup_result]
cart_item_response = result[:cart_items_response][:cart_item_response]
total_tax = cart_item_response.map { |item| item[:tax_amount].to_f }.inject(:+)
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