Selected balance sheet and income statement information for drug store retailers CVS Caremark Corp. and Walgreen Co. follows.

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Company ($ millions) CVS Caremark....... Walgreen Co...... Ticker CVS WAG 2012 Sales 2012 NOPAT $123,133 $4,452 2,182 71,633 2012 Net Operating Assets (NOAT) for each company. c. Discuss any differences in these ratios for each company. $46,152 21,465 2011 Net Operating Assets $46,677 15,700 a. Compute the 2012 return on net operating assets (RNOA) for each company. b. Disaggregate RNOA into net operating profit margin (NOPM) and net operating asset turnover