Add option for dipslaying energy pricing too

[alarmatwork]

I know the grid pricing and also I've calculated the average price of the battery based energy.
It would be super nice to display price next to energy sources and also the current cost on the consumers, based on the current consumption level.

I could calculate all the values by myself, but just need place to display values and symbols like € or $/h etc.

See attached image.. where I used temp placeholder for dipslaying the cost: