jQuery adding variables
<p>I have used following code to add three variables but instead of adding these variables its concatenating these variables.</p>

<pre><code>var registration_fee = $('input[type="radio"][name="registration_fee"]:checked').val();
var material_fee = $('input[type="radio"][name="material_fee"]:checked').val();
var tuition_fee = $('input[type="radio"][name="tuition_fee"]:checked').val();
// alert(tuition_fee)
var total_fee = registration_fee + material_fee + tuition_fee;
$('#total_fee').html(total_fee);
</code></pre>
