What is the ruling on adding the costs of sponsored advertisements to the price of a product, and is it permissible to sell a product at a price higher than its known market price, with the addition of a profit margin exceeding the usual profit?

There is no specific percentage of profit determined by the Shariah in absolute sales. If the two parties agree on a certain price, there is no harm, as Allah Almighty says: "Unless it be a trade by mutual consent," and as the Prophet, peace and blessings be upon him, said: "Indeed, selling is by mutual consent." It is stipulated that the sale must be free from Shariah prohibitions such as lying and deception. It is known among traders to collect all the costs of the commodity to reach the buyer, such as transportation, packaging, and storage.