[middlee]

<input type="radio" value="540" name="rol" id="njk">
<input type="radio" value="530" name="rol" id="lmt">

$(document).ready(function(){
     var totalSum = {$view.price};

$('input[name=rol]').click(function(event) {
       totalSum += parseInt($(this).val());
       $('#totalsum').html(totalSum);
});
 $('#totalsum').html(totalSum);
});