Complex sentence: Members make monthly financial contributions forming the Edir's fund and they will be entitled to receive a certain sum of money from this fund, the rate of which varies based on how close the deceased is to the Edir member.
Split into simpler sentences: Members make monthly financial contributions forming the Edir's fund. They will be entitled to receive a certain sum of money from this fund, the rate of which varies based on how close the deceased is to the Edir member.