Q 2:
What is the ruling of fixing profit?
A:
It is permissible for a person to sell the commodities that he owns and possesses for a fixed profit or a fixed percentage, and to sell them with a non-fixed profit provided that both parties know the final price for which they agreed. (Part No. 13; Page No. 242)
May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.