<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>
<script>
var jQ = $.noConflict(true);
// version 1
jQ( document ).ready(function() {

jQ('input[name="number5"]').prop('readonly', true);
jQ('input[name="number9"]').prop('readonly', true);
jQ('#item12_0_checkbox').val(100);
jQ('#item12_1_checkbox').val(50);
jQ('#item12_2_checkbox').val(50);
jQ('input[name="cont_scholarship"]').addClass( "sum" );
jQ('#item12_0_checkbox').addClass( "sumdues" );
jQ('input[name="checkbox12[]"]').on('click', function() {
if (jQ(this).is(":checked")){
jQ(this).addClass( "sumdues" );
}else{
jQ(this).removeClass( "sumdues" );
}

calc_dues();
});
// Calculates on scholarship change
jQ('input[name="cont_scholarship"]').on('change', function() {

calc_dues();
});

// This is the calculate function
function calc_dues() {

var sum_member = 0;

jQ('.sumdues').each(function(){

if(jQ.isNumeric(this.value)){

sum_member += parseFloat(this.value);

jQ('input[name="number5"]').val(sum_member);

var CSFund = jQ('input[name="cont_scholarship"]').val();
if(jQ.isNumeric(CSFund) && CSFund >0){
var grandTotal = parseFloat(CSFund) + sum_member;

jQ('input[name="number9"]').val(grandTotal);
} else {jQ('input[name="number9"]').val(sum_member);
}
}
});
}
//This runs the calculate function on load to fill in already checked values
calc_dues();
});
</script>