for dir in ${*:-.}; do  if [ -e $dir ]; then    result=$(du -s $dir | cut -f 1)    let total=$result*1024    echo -n "Total for $dir = $total bytes"    if [ $total -ge 1048576 ]; then      echo " ($((total/1048576)) Mb)"    elif [ $total -ge 1024 ]; then      echo " ($((total/1024)) Kb)"    fi  fidone