Other variants of the model are FPIF (Fixed Price Incentive Fee) contracts, in which the seller is offered an additional payment for the service that goes beyond that specified in the contract. For example, the seller can deliver in advance or add features that go beyond the scope of the original project. A fixed-price contract, also known as a lump sum contract, is an agreement between a seller or seller and a customer that determines the goods and/or services provided and the price paid for them. For example, Dwight is an agent for big hip-hop stars. His work is strongly concerned with negotiations. Dwight helps negotiate contracts for his artists. For Dwight, the final pricing clause of the contract is really the deciding factor for success or failure in his work. Dwight is working on a contract today. He has concluded the agreement and is satisfied. This price is different from the above: one payment per album, one payment per concert or tour, travel and accommodation and some for living expenses. Unlike the standard contract, Dwight knows that small differences have a big impact. .