A tour operator designs and packages trips (combining transport, accommodation, and activities), a travel agent sells trips -- sometimes packaged by others -- directly to travelers, and a Destination Management Company (DMC) provides on-the-ground local logistics and expertise within a specific destination. Building a good itinerary means balancing activity time, realistic travel/transfer time between locations, and rest, since overpacking a schedule leads to exhausted, dissatisfied travelers. When costing a package, operators must account for accommodation, transport, guiding fees, entrance or park permits, and a markup for profit and risk, all before arriving at a final sale price.