Your question might be better answered if you included the type of services or merchandise the customers are buying. Some services and some merchandise are targeted for consumption by specific groups. Perhaps the majority of your customers are indeed white, which would easily explain your question. Incidentally, how are you certain the callers are white?
User Detail :
Name : Todd24646, Gender : M, Age : 47, City : Cincinnati, State : OH, Country : United States, Education level : Less than High School Diploma, Social class : Middle class,