Some may find this useful. To save mucking about, click on one of the examples & then fine tune. Not sure what the average for #7 is though.
http://www.ukpower.co.uk/tools/running_costs_electricity/
I am in no way affiliated with the above company.
Enjoy.
http://www.ukpower.co.uk/tools/running_costs_electricity/
I am in no way affiliated with the above company.
Enjoy.