Energy dashboard cost unit

I think it would be great to have as information, the unit cost for each band, very useful when looking at the chart daily/weekly/monthly

currently only the sum is reported;

I will insert screenshot with my idea

I would be great to have the cost also in the graph and not only the energy.

It could also be an additional option; perhaps with the option to deactivate the graph; the price could be added right and left remain the kw.

I also see the tooltip option as handy for representing individual entities