Feature Request: Sum of all tariffs and costs for each cycle (utility_meter)

[FragMenthor]

Automatically create 2 more sensors, for each utility_meter:

• Sum of energy of all tariffs
• Sum of cost for all tariffs

Then it would be possible to have, automatically, without doing templates: daily / monthly consuptions and costs, derived from the sum of the tariffs for each cycle. I think this would improve a lot this integration, because everyone that uses it the right way will have to always do this template sensors "by hand". Thanks again :)