 They are released in stores as a CD with a slip-sleeve cover including a hit song, bonus tracks from the same artist and a code to allow buyers to go online and download a "free" ringtone of the main song.They are sold between $5.98 and $6.98 USD.Sony BMG Music Entertainment released around 50 titles during October and November 2007, and Universal Music Group released 10 to 20 titles.