ecartes

$var_1 = field_get_items($entity_type, $entity, 'field_cot_fieldcoll_cantidad');
$var_2 = field_get_items($entity_type, $entity, 'field_cot_fieldcoll_valorunit');
$var_11 = array_pop(array_pop($var_1));
$var_22 = array_pop(array_pop($var_2));
$sum_t = (int) $var11 * (int) $var_22;