Request for Power Usage Monitoring Template by months

**Is your template request related to a problem? Please describe.**
I need to keep track of monthly power usage from the digital power meter reading in kWH. However to do so, I'll need to use the reading on the last date of the month deducting the reading on the last date of the previous month.

**Describe the solution you'd like**
Is there a way to tabulate this monthly power readings?

**Additional context**
Add any other context or screenshots about the feature request here.

The issue mentions no files, tests, or entry points. Start by reviewing existing community templates and clarifying how month-end and previous-month meter readings should be represented; the issue does not define enough acceptance criteria to determine when the work is done.

Written by the indexing model from the issue text.