title: How S3 storage cost works on daily basis?
body: <p>I’ having hard time to calculate S3 storage cost. The case is that I need to store daily backups to it.</p>
  
  <p>The scenario: Let's say that I lease S3 service on 1st of January and send to it 10 files (zip) 10GB each. Then, every single day the 2 oldest files will be deleted and replaced by 2 new ones (10 GB each). So, every day will always stored 100GB of files.</p>
  
  <p>How do I calculate the storage cost in this case? What will i pay at the end of January? </p>