If you want to get rid of the 'cut', you can do it all in Perl using the -a and -F switches (see perlrun for details) to autosplit the input line into the @F array: 
perl -lanF, -e '$sum += $F[6]; print "Sum is $sum" if eof' in.csv

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In reply to Re: Efficient way to sum columns in a file by dave0
in thread Efficient way to sum columns in a file by sk

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