I took US sales data for weeks 2 through 9 and fit a basic trend line to it. I excluded week 1 because that number is very inflated. I used that to make a rough estimate of the next few months:
Prediction:
Week 10 - 101,511
Week 11 - 90,112
Week 12 - 79,705
Week 13 - 70,123
Week 14 - 61,269
Week 15 - 53,017
Week 16 - 45,298
Week 17 - 38,048
Week 18 - 31,212
Week 19 - 24,745
Week 20 - 18,610
Total sales after 20 weeks (November 6): 2.84 million
I would say this is an underestimate of the actual number... I would think the trend would flatten out a little more by week 18 or so, and events such as the VMAs, the concerts, and future single / video releases will give boosts to the sales. The holidays should also give this album a very large sales boost.
I would think ~ 3.3 to 3.5 million by the end of the year










