Tibber Pulse sensor

I have Tibber Plus and get via
sensor.accumulated_reward_wtresidence
info about my sales of solar electricity in SEK/day.
There is the equivalent for electricity costs but also
sensor.monthly_cost_xxx for per month.

Since there is no “reward” per month as a default sensor, I need to find a solution for it. Anyone have some code to share or another solution?

#tibber
#solar rewards