Shell Programming and Scripting

Can any one help me to correct following script.

I have 2 directories DropZone and ProcessZone. File pattern is *VEHDESCSUM*.
Finding the 'no of files' in DropZone directory using ls *VEHDESCSUM* |wc -l
If DropZone has more than one file or 0 files then exit 1
If DropZone has one file then move file from DropZone to ProcessZone.

I am trying with the following code. But I am getting errors.

#!/bin/sh
##########################################################

DROP_ZONE=/apps/dsadm/GMCCi2/DropZone
PROCESS_ZONE=/apps/dsadm/GMCCi2/ProcessZone

echo ${DROP_ZONE}
echo ${PROCESS_ZONE}

cd $DROP_ZONE

cnt = ls *VEHDESCSUM* |wc -l

echo ${cnt}
if [ cnt -gt 1 ]
then
exit 1
else
mv $DROP_ZONE/*VEHDESCSUM* $PROCESS_ZONE
exit 0
fi

##########################################################


thanks for all

I think you have to use "$cnt" inside the bracket where you are checking for > 1

I have done changes above script. But still getting errors: "argument expected" Could you please any one correct my script.
========================================

DROP_ZONE=/apps/dsadm/GMCCi2/DropZone
PROCESS_ZONE=/apps/dsadm/GMCCi2/ProcessZone

echo ${DROP_ZONE}
echo ${PROCESS_ZONE}

cd $DROP_ZONE

echo FILE_COUNT = ls *VEHDESCSUM* |wc -l

if [ $FILE_COUNT -ne 1 ]
then
exit 1
else
mv $DROP_ZONE/*VEHDESCSUM* $PROCESS_ZONE
exit 0
fi
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