Why am I being cahrged on the very first day of Blumix trial? : 
 i signed up bluemix, so i am on trial account
I have started learning Kitura along the tutorial https://developer.ibm.com/swift/2016/07/06/tutorial-deploying-a-swift-to-do-list-app-to-the-cloud/#comment-2218

I uploaded the files a several time to make the server run (actually the tutorial gave me wrong link for the files)
now it works.

but I saw my Runtime Cost is $289.
[![enter image description here][1]][1]
[![enter image description here][2]][2]

I have not added any support plan
although I have not put my credit card info yet, is that what is going to be charged after Trial or for every month ?
Why am I being charged anyway?
nearly $300 is too high for testing a server.
Would you explain about the Runtime Cost that I am currently being charged please?


  [1]: http://i.stack.imgur.com/oeCdv.jpg
  [2]: http://i.stack.imgur.com/d1bT2.jpg