The McDonald's Corporation's business model is slightly different from that of most other fast-food chains. In addition to ordinary franchise fees and marketing fees, which are calculated as a percentage of sales, McDonald's may also collect rent, which may also be calculated on the basis of sales. As a condition of many franchise agreements, which vary by contract, age, country, and location, the Corporation may own or lease the properties on which McDonald's franchises are located. In most, if not all cases, the franchisee does not own the location of its restaurants