1 MD 2.56 171,000,000 1.06 CD-R/RW 1.77 75,220,000 0.89 71,000,000 118,000,000 13101 1255 7,522 6.7 3.4 6.1 CD-R CD-R/RW1 29% 6.1 1.77 CD-R/RW 1.77 7,522 0.89 11,800 CD-R/RW CD-R/RW 11,800 2 = 23,600