Finally got back to this.

The Check boxes need their options to be Yes and No Paste the code below into a HTML element in your form. Add two number input elements to your form. Name the Yes one numberyes and the No one numberno. Now preview your form and either look at the source code or use Firebug addin for Firefox to look at the code for the Yes and No input numbers. My input numberyes had a div id="item11_number_1" and the Yes label had a div id="item11". Tweak the code below where you see these to match yours. Do the same for the numberno input. Mine was id="item12_number_1" and id="item12".
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function () {
$("input[value=Yes]").each(function () {
$(this).change(updateCountyes);
});
updateCountyes();
function updateCountyes () {
var countyes = $("input[value=Yes]:checked").size();
$("input#item11_number_1").val(countyes);
$("label#item11").toggle(countyes > 0);
};
$("input[value=No]").each(function () {
$(this).change(updateCountno);
});
updateCountno();
function updateCountno () {
var countno = $("input[value=No]:checked").size();
$("input#item12_number_1").val(countno);
$("label#item12").toggle(countno > 0);
};
});</script>
Lets all say JQuery is cool.