So far I thought that the number of lost points per minute is calculated by formula initial_cost / 250. According to this post I'm correct. But after some lookup into standings of last contest I found some contradictions:

• Problem А (500 points): 1 point per minute
• Problem B (750 points): 2 points per minute
• Problem С (1000 points): ~2.67 points per minute
• Problem D (1500 points): 4 points per minute
• Problem E (2000 points): ~5.33 points per minute
• Problem F (2500 points): ~6.67 points per minute
• Problem G (3000 points): 8 points per minute
• Problem H (3500 points): 9.33 points per minute
• Problem I (4000 points): 10.67 points per minute

That definitely says that I was wrong. I'm not complaining about format or something else. Just want some explanation of exact formulas. Am I missed some new clarification on that thing MikeMirzayanov?

P.S: just seeking for explanation after no answer on comment. Constants was calculated from great performances of boboniu and maroonrk.