how to find a sum of multiple numbers

I have a command which returns some numbers as follows:
$ls -l ${dbname}.ix* | awk '{print $5 }'
929792
36864
57344
73728
53248
114688
How can I find the sum of those numbers by piping this output into 'awk' or some other editor/command? Thanks a lot -A

Just off the top of my head:

ttotal=0
ls -l ${dbname}.ix* | awk '{print $5 } >tempdat
while read zf
   do
   tvalue="$zf"
   ttotal=$((ttotal+tvalue))
done <tempdat

echo $ttotal

Note: to add, you could also try the following command with the "bc" option (calculator)

ttotal=$(echo $ttotal + $zf | bc)
$ls -l ${dbname}.ix* | awk '{print $5;s+=$5}END{print "Sum :" s}'

Regards

another way:

ls -l ${dbname}.ix* | awk '{sum+= $5; print $5 } END {print sum}'