I Deserve payment if

If my student gets a rank 100 and other students get rank 150, my student got better rank and I can take the fees.
If my student gets a rank 10000 and other students get rank 15000, my student got better rank and I can take the fees.
If my student gets a rank 300000 and other students get rank 450000, my student got better rank and I can take the fees.