Trade

Receiving the normal price of an item when returning an item instead of the discounted price

Q: If a person sells a certain item and a discount was given to the customer and thereafter the customer wants to exchange the item or be refunded for it, will it be permissible to subtract the discount given (proportionally)? If the discount is not reversed will it be regarded as interest?

Selling a car as a loophole to acquire a loan

Q: I have a question regarding interest. I have a financial issue in my business. I need around 5 million to complete my running order. A friend of mine has an electronics business. He is selling his products at a higher price in easy monthly installments. As I told my problem to him, he bought a vehicle for 5 million pkr and sold me this vehicle for 7.5 million in six monthly installments. I sold this vehicle to the same owner at a lower price (4.99 million) and took money for completing my order. Is this haram in Islam? Because my friend is taking money against a product, not against money, and I'm paying him for a vehicle, not for money. If it is haraam, then what is the solution because I already used the money and invested in my business after selling the vehicle.