Each charts provides ability to dive down into your usage details:

Daily View Detail

As you hover over each day on the cost screens, you can see the total cost of the energy portion of your bill used by day or by month.

Usage displayed may be estimated during times the advanced meter was not able to transmit data. This could be caused by a temporary network interruption or event such as a power outage. During these times, usage may be estimated until the data flows again and the actual meter readings catch up. You will only be billed for actual usage once that data becomes available.

You can easily download data into format that meets your reporting needs.