Pricing of databases in Azure
That blog is a bit old, so I don't know if everything is still accurate. In the Azure world things work very fast and information changes often.

Info from the main Azure site:


  The prices are per database per month!
  
  Database Size Price Per Database Per Month    Database Units (DU) that
  will appear on your Bill Greater than 10 GB to 50 GB  $45.954 for
  first 10 GB, $1.996 for each additional GB    
  
  4.6 DU for first 10 GB
  0.2 DU for each additional GB


That means that if you have a single database that's under 50 GB (and higher than the previous category of 10 gb), you'll pay 125$ per month while the database is online.