How to get total power consumed in a month from power graph?

[buomque]

Hi Cacti community,

My power graph has 2 sources: power1 & power2. How can I get a total power consumed by each source in a period of time (total power consumed in a day / week / month)?

I have tried different plugins such as Aggregate, Flowview, Monitor but I've had no luck so far.

Thank you,