Sitting for 20 minutes is just as profitable as working the same 20 minutes for 175 rubles? Or am I not understanding something?

Often exactly so.
Amortisation during the same period may amount to 350.

I remembered a colleague’s story.
She sits at home on the weekend, relaxing with a glass of good wine, her favorite book.
Then one of the former cavaliers calls her and invites her to sit down, "blow up a beer ".
She didn't go and explained this way - why do excessive body movements, drag somewhere, change the wine for a buchlo, and still and then to endure when you are bored?