Story Time:

In the late 90s , early 2000, I remember we had our first landline (phones where a luxury on our part of the world) , with that our first 56k internet connection.

I remember vividly waiting for 14:00 (02PM) so I could connect to the internet paying only a single "pulse".

Back in my tiny remote rural village in brazil, most houses where build by brick layers people hired directly and I lots of owners worked with them to speed up the process, run plumbling and
eletricity, paint and do the floors etc, mylate father included.

Being quite handy, he also did all the wiring for the landline and the for modem.

While he was handy, he was by no means an electrician, so one bizarro side effect for the amateur wiring was that whenever someone turned on the Shower, the internet connection would go down.

And for some bizarre reason, it was only the internet connection, while the shower was turned on, the phone would work fine... some years later broadband internet got widespread and it was unnaffected by the shower.

!rant
Eletronics question.
Hey guys.
Question here.
How do I calculate the cost of a machine in power consumed?
Like, my 3D printer has a 40A power suply, how could I calculate to get a € value from it?
Thanks