I am planning to create a lot of EC2 instances in the AWS free tier account. I am not yet familiar with the pricing details. Suppose we can create a maximum of 20 instances under free tier. Let's say I have created some 18 instances. Again if I want to create a 5 more, it's not possible as it reaches max, so I am planning to delete 3 and create another 5. Now, will those deleted instances be taken to consideration or not?