$primary_group=$user_id!=-2?$this->Conn->GetOne('SELECT GroupId FROM '.TABLE_PREFIX.'UserGroup WHERE PrimaryGroup = 1 AND PortalUserId = '.$user_id):false;
if($primary_group){
$sql='SELECT Price, Cost
FROM '.TABLE_PREFIX.'ProductsPricing
WHERE (ProductId = '.$this->GetID().') AND (GroupId = '.$primary_group.')