title: unable to track down AWS TimedStorage-ByteHrs Billing Cost
body: <p>All the servers (and its volumes) I'm having on AWS EC2 are tagged (customer, app, staging/prod, ...)</p>
  <p>When I check the billing, I have a monthly EU-TimedStorage-ByteHrs cost.
  This cost only appears for servers with 1 specific tag Customers.
  When I track further down, for example checking all the servers for that specific customer, this EU-TimedStorage-ByteHrs cost never appears. Only when I have a look on the group of all servers for that customer.</p>
  <p>Any help how I exactly know where this cost EU-TimedStorage-ByteHrs is coming from?</p>