MP3 Sales March 2004 Total March 2004 Dollar Volume $45,554,700. Rank_Brand__________March '04 Unit Sales 1.____Apple___________________34.9% 2.____Rio_____________________15.2% 3.____RCA____________________11.1% 4.____IRiver_____________________8.5% 5.____Digitalway_________________8.0% All others_______________________22.30% Source: NPD Group / NPD Techworld