Murabaḥah is a term for a sales contract where the buyer and seller agree on the markup (profit) or "cost-plus" price for the item(s) being sold, which covers the cost of what?
Markup (business) Markup is the ratio between the cost of a good or service and its selling price. It is expressed as a percentage over the cost. A markup is added onto the total cost incurred by the producer of a good or service in order to cover the costs of doing business and create a profit. The total cost reflects the total amount of both fixed and variable expenses to produce and distribute a product. Markup can be expressed as a fixed amount or as a percentage of the total cost or selling price. Retail markup is commonly calculated as the difference between wholesale price and retail price, as a percentage of wholesale. Other methods are also used.
Bay'ah Bayʿah (Arabic: بَيْعَة‎ ‎ , literally a "sale" or a "commercial transaction"), in Islamic terminology, is an oath of allegiance to a leader. It is known to have been practiced by the Islamic prophet Muhammad. "Bayʿah" is sometimes taken under a written pact given on behalf of the subjects by leading members of the tribe with the understanding that as long as the leader abides by certain requirements towards his people, they are to maintain their allegiance to him. "Bayʿah" is still practiced in countries such as Saudi Arabia and Sudan. In Morocco, "bayʿah" is one of the foundations of the monarchy. In many Islamic traditions, the meaning is to dedicate oneself to a spiritual master, pir or sheikh in exchange for the spiritual knowledge he gives.