This week "MDNA" rises 140-94 with 5,000 sold. The bulk of those sales came from CDs sold via either Internet retailers like Amazon.com, through mail order or at the venues where her MDNA concerts were held. Most of those sales seem to be sparked by her tour stops along the east coast, in cities like Boston, New York and Atlantic City.
For example, while "MDNA" is the No. 94 selling album overall on the Billboard 200 (reflecting across the entire U.S.), it was actually the No. 21-selling set in Boston and the No. 29-seller in New York City.
From Billboard.biz