The assignment model is a special form of a linear programming model that is similar to the transportation model. There are differences, however. In the assignment model, the supply at each source and the demand at each destination are each limited to one unit. The Atlantic Coast Conference (ACC) has four basketball games on a particular night. The conference office wants to assign four teams of officials to the four games in a way that will minimize the total distance traveled by the officials. The supply is always one team of officials, and the demand is for only one team of officials at each game. The distances in miles for each team of officials to each game location are shown in the following table: The travel distances to each game for each team of officials Game Sites Officials Raleigh Atlanta Durham Clemson A 210 90 180 160 B 100 70 130 200 175 105 140 170 D 80 65 105 120