SELECT DISTINCT Procera.ip, SUM(Procera.total)+(SELECT total FROM ProceraNow WHERE ip = Procera.ip) AS 'Usage'
FROM Procera JOIN ActiveLease
    ON Procera.ip = ActiveLease.ip AND Procera.date = ActiveLease.date
WHERE Procera.date LIKE '02/%'
GROUP BY Procera.ip
ORDER BY 'Usage' DESC