The numbers were indeed far far off. I am not a tech person, saw in the activity monitor - Firestorm on Mac using 38 power units - and googled and it said it was for kilowatt hours. The price here for kWh is around 0.5 USD atm, was almost triple the other day, then double.
When I posted this, 38 kWh would have costed around 12 USD, or somewhere near L$4k, that day.
The actual cost, turned out to be around... 0,4 kWh at the peak, or 11 cents US, as the most expensive hour this week, Firestorm on low graphics, non-stop. - 9 SL hours on the dollar, 12 dollars = L$ 4.000, giving a total of 108 hours, give or take, or two weeks of 8 hours a day.
I might be wrong again, just not THAT wrong