ls -l | awk '{if(-f $9) { total +=$5 } }; END { print total }

find . -maxdepth 1 -type f -printf "%sn" | awk '{sum+=$1} END{print sum}'

wc -c * 2> /dev/null

wc -c * 2> /dev/null | tail -1

find . -maxdepth 1 -type f -exec ls -ltr {} ;| awk 'BEGIN{sum=0} {sum=sum + $5} END {print sum}'