For instance, assume a purchaser's utilization set is X = {nothing, 1 apple, 1 orange, 1 apple and 1 orange, 2 apples, 2 oranges), and his utility capacity is u(nothing) = 0, u(1 apple) = 1, u(1 orange) = 2, u(1 apple and 1 orange) = 5, u(2 apples) = 2 and u(2 oranges) = 4. Then this customer favors 1 orange to 1 apple, however inclines toward one of each to 2 oranges.