Complex sentence: King has sold more than 10 million records in the United States including the "O Brother, Where Art Thou?", "Down From the Mountain" and "More Music From Ray" soundtracks.
Split into simpler sentences: King has sold more than 10 million records in the United States. He featured on the "O Brother, Where Art Thou?", "Down From the Mountain" and "More Music From Ray" soundtracks.