Perl Script

Hey everyone, got a problem with a Perl script I'm trying out. In my Perl script, I have the user input a number to dynamically display a number of text form fields in which they enter figures. At the bottom, there will be a button to give the sum of all the numbers in the text fields--that's where I'm stuck, I got the text boxes to show up alright, but that's about it. I thought I might use JavaScript, but that didn't turn out to well. I was thinking of using arrays for the name referencing in the javascript part, but I couldn't figure that out either. Here's the script
Code:

#!/usr/bin/perl -wuse CGI;
$query = new CGI;
$JSCRIPT=<<EOF;
// Any JavaScript Ideas??
EOF
;
print $query->header,"\n";
print $query->start_html(-title=>'JavaScript Summations',-script=>$JSCRIPT),"\n";
print "<h1>Choose to add up a Summation of costs</h1>\n";
print $query->p,
"Just enter in the number of items you will need to include then hit "Submit Query" to get the form boxes","\n";
print $query->start_form(-name=>'formA',
-method=>'get'),"\n";
print "<p>How many items?\n";
print $query->textfield('item'),"<br />\n";
print $query->submit,$query->reset,"</p>\n";
$list = $query->param('item');
print "<ol>\n";
for (1..$list) {
print qq{  <li>Input a cost(\$): <input name=\"field$_\" type=\"text\" /></li>\n};
}
print "</ol>\n\n";
print "<input type=\"button\" value=\"Get Sum\" onclick=\"doSum()\" \/>\n\n";
print $query->end_form,"\n\n";
print $query->end_html;

This is like my second serious Perl script and I couldn't think of the syntax that would accomplish my task--I wouldn't even know how to search for it really, but I'll continue to play around with ideas. Thanks, in advance, for any help.

Best regards,
ezincenter