while read value1
do
a=`echo $value1 | cut -d ' ' -f1`
b=`echo $value1 | cut -d ' ' -f2`
c=`echo $value1 | cut -d ' ' -f3`
while read value2
do
a1=`echo $value2 | cut -d ' ' -f1`
b1=`echo $value2 | cut -d ' ' -f2`
c1=`echo $value2 | cut -d ' ' -f3`
if [ "$a" = "$a1" ]
then
b2=`expr $b - $b1`
echo $a $b2 $c $c1 >>outfile
fi
done<file2
done <file1
sort -o outfile2 -2 outfile
while read out1
do
x=`echo $out1 | cut -d ' ' -f1`
grep $x outfile2 | head -1 >>finalout
grep -v $x outfile2 >tmp
mv tmp outfile2
done<outfile2