Which LAM customer used the Euro as their currency and had the highest consumption in October 2013?
October 2013 refers to 201310 in the yearmonth.date
SELECT T1.CustomerID FROM customers AS T1 INNER JOIN yearmonth AS T2 ON T1.CustomerID = T2.CustomerID WHERE T1.Segment = 'LAM' AND T2.Date = '201310' AND T1.Currency = 'EUR' GROUP BY T1.CustomerID ORDER BY SUM(T2.Consumption) DESC LIMIT 1