why isn't my sort working??? Thanks perl people! : )

use warnings;
use strict;

my $file    = qq(/var/adm/sa/vm);
my $vmout   = qq(/var/adm/sa/vm.out);
my $cpuout  = qq(/var/adm/sa/cpu.out); 

open (FILE, "<$file") || die "unable to open file $!";
open (MEMOUT, ">$vmout") || die "unable to open file $!";
open (CPOUT, ">$cpuout") || die "unable to open file $!";

        while (<FILE>) {
                local $, = "\n";
                if (/^\d+/) { s/fre//,print MEMOUT +(split)[4], $, ;}

if (/^\d+/) { s/id//,s/wa//,print CPOUT (sort {$a <=> $b} +(split)[16]
+),$,;}    ##--## Added sort after "print CPOUT"
        }
        #sub num { $a <=> $b }
        #my @sortlist = sort num $cpuout;

close (FILE) or warn unable to close file $!";
close (MEMOUT) or warn unable to close file $!";
close (CPOUT) or warn unable to close file $!";

__DATA__

So everyone is saying I cannot embed a sort within a 
print of a FileHandle on column 16?  I want to put the DATA below in n
+umeric order.

data from $cpuout

381305

377927

381305

377927

377165

373656

373614

373614

373248

390423

390423

390255

390111

389959
[download]