Bristol-Myers Squibb (BMY) reports the following table in its 10-K report relating to the change in sales from 2011 to 2012.

a. Did U.S. net sales increase or decrease during the year? By what percentage? How much of this change is attributable to volume versus price changes?

b. By what percentage did foreign net sales change during the year? How much of this change is attributable to volume versus price changes?

c. Why does the change in total net sales \((17 \%)\) not equal the sum of the changes in U.S. of \((26 \%)\), Europe net sales of (4)\% and "Rest of the World" net sales of (1)\%?

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Net Sales United States ().. Europe) Rest of the World (c). Total... Total Change (26)% (4)% (1)% (17)% Volume (30)% 6% 2% (17)% Analysis of % Change Price Foreign Exchange 4% (3)% (1)% 2% (7)% (2)% (2)%