Get the total number of votes, from fivestar or flag

Hi, thanks for this module. I want to make a sorting algorithm like the used by Hackernews or Digg. It will have two variables: the age of the node and the sum of the votes. I want the result of this calculation in a CCK field, and after that, I will sort the nodes using views.

I have already created a computed field for the age of the node, here is the code:

$entity_type = 'node';
$created = $entity->created;
$now = time();
$age = ($now-$created);
$entity_field[0]['value'] = $age; 

I have a Fivestar field, with only one star. The users can vote the nodes they like. I would like to create another computed field, which displays the sum of the votes. I have tried several ways but I'm not able to do it.

Thanks for your help.