Shelly EM show monthly cost option in HA

Hi, you all wonderful minds!! I’m so new to this domain that I’m seeing only colors and balloons right now. So I’m a totally newbie, be gentle please!! :wink:
I have a HA running on Win 10 machine. Shelly EM running MQTT(HassWP_2023).
I didn’t manage to show the actual cost of energy spent it. Please Help! BIG Thank you!