#!/usr/bin/perl
# print_sum - read from stdin and print the sum.

$total = 0.0;

while (<>) {
 if (m/^\s*([\d.]+)/) {
   $maybe_number = $1;
   $maybe_number =~ s/\.*$//; # chop trailing ".".
   if ($maybe_number =~ m/\d/) {
       $total += $maybe_number;
   }
 }
}

print "$total\n";