Energy dashboard shows wrong cost

Hi,

This is a weird one. It’s not a major issue as it’s only a small difference, but the monthly cost on my Energy dashboard is incorrect. According to the dashboard my electricity use for November was 162.53 kWh, which is correct (i.e. it matches my electric company’s billing). I use an entity for the price which is set to 0.1688472 EUR and hasn’t been changed in the last 2 months. So the total monthly cost should be 162.53 x 0.1688472 = 27.442735416. But the dashboard shows 28.53. Why might this be?

Dashboard:


Entity:
image
Dashboard settings:

Thanks,
Tom