Your company has just started using the resources on the AWS Cloud. They want to get an idea of the costs being incurred so far for the resources being used. How can this be achieved?

Answer options:

A.By going to the Amazon EC2 dashboard. Here you can see the costs of the running EC2 resources.
B.By using the AWS Cost Explorer. Here you can see the running and forecast costs.
C.By using the AWS Trusted Advisor dashboard. This dashboard will give you all the costs.
D.By seeing the AWS Cloud Trail logs.

The correct answer is Option
B.The AWS documentation mentions the following on AWS Cost Reports:
Cost Explorer is a free tool that you can use to view your costs. You can view data up to the last 12 months and 12 months forecast how much you are likely to spend for the next three months and get recommendations for what Reserved Instances to purchase.
For more information on AWS Cost Reports, please refer to the below URL:
http://docs.aws.amazon.com/awsaccountbilling/latest/aboutv2/cost-explorer-what-is.html