I started an experiment one year ago.
I bought a new phone (360 โฌ). I decided to pay it in installments. Then I entered the amount of imaginary satoshis I would have to pay every month per each installment into a table.
After one year I could look those up and see how many "sats" I paid.
I did this, expecting the magical fourth year of the cycle.
It didn't turn out the way I imagined, but I learned something.
Here's the table:

Ironically, although I paid more sats, the total amount of those sats measured in Euro, would be less today.