as-sallamun alaikum iam a represetative of a rhop selling some materia is it halala to add a little amount of money on the price apart of the owners price.
Salaam Alaiykum,Islam lays the greatest emphasis on Qat Haldl (food earned through lawful means). The pious among us believe that just as nasty food spoils our physical health, similarly, food earned through unlawful means spoils our spiritual and moral health.
Islam is most vehement in its condemnation of commercial dishonesty. It denounced, in the strongest possible terms, all sorts of deceitful dealings and illegal profits. It has disallowed all transactions not based upon justice and fair play.
The Holy Prophet (may peace be upon him), while reprimanding the dishonest dealer, said:
"Laisa minna man gashshdna" (Whosoever deceives us is not one of us).
What you are asking is for approval to deceive BOTH the buyer and the seller in a business transaction. This is most definitely unlawful and will not be good for your spiritual and moral health. You may feel some financial gain and relief but the negative effects of this temporary and false ‘gain’ will be felt in some form or another.
Here are some of many Hadiths from Sahih Muslim which pertain to Business Transactions: Book 10, Number 3663:
Abdullah b. Dinar narrated that he heard Ibn 'Umar (Allah be pleased with them) saying :
A man mentioned to the Messenger of Allah (may peace be upon him) that he was deceived in a business transaction, whereupon Allah's Messenger (may peace be upon him) said : When you enter into a transaction, say : There should be no attempt to deceive.
Book 10, Number 3664: This hadith has been narrated on the authority of 'Abdullah b. Dinar with the same chain of transmitters but these words are not found in it . "When he buys he should say: There should be no attempt to deceive."
For your own good and blessings, always beware of Shaitan’s trappings and stay on the straight and fair path. Salaam