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Script read highest value

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http://www.unix.com – Hi All, Can someone help steer me to the simplest approach to write a script that reads the second column of a csv file and returns the highest value. example file: DATE,QUANTITY Mon Apr 30 01:56:00 2012,42 Mon Apr 30 02:24:00 2012,72 Mon Apr 30 02:56:00 2012,102 Mon Apr 30 02:59:00 2012,132 Mon Apr 30 03:31:00 2012,222 Mon Apr 30 03:38:00 2012,192 TIA (HowTos)