SELECT @charges=ISNULL(MAX(a.maxcharge), 0.00) FROM( SELECT (SELECT MAX(maxcharge) FROM(VALUES(ilongcharge),(iwidthcharge),(iheightcharge),(iweightcharge ),(ivolumecharge)) AS maxcharge(maxcharge))AS maxcharge FROM @temp) a
SELECT @charges=ISNULL(MAX(a.maxcharge), 0.00) FROM( SELECT (SELECT MAX(maxcharge) FROM(VALUES(ilongcharge),(iwidthcharge),(iheightcharge),(iweightcharge ),(ivolumecharge)) AS maxcharge(maxcharge))AS maxcharge FROM @temp) a
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