18 Berk/DeMarzo, Corporate Finance, Fourth Edition, Global Edition
a. Use this data to compute Costco’s ROE using the DuPont Identity.
b. If Costco‘s managers wanted to increase its ROE by one percentage point, how much higher
would their asset turnover need to be?
c. If Costco‘s net profit margin fell by one percentage point, by how much would their asset
turnover need to increase to maintain their ROE?
2-42. For fiscal year 2015, Walmart Stores Inc. (WMT) had total revenues of $484.65 billion, net
income of $16.36 billion, total assets of $203.49 billion, and total shareholder’s equity of $81.39
billion.
a. Calculate Wal-Mart’s ROE directly, and using the DuPont Identity.
b. Comparing with the data for Costco in problem 41, use the DuPont Identity to understand
the difference between the two firms’ ROEs.
2-43. Consider a retailing firm with a net profit margin of 3.1%, a total asset turnover of 1.85, total
assets of $44.4 million, and a book value of equity of $18.2 million.
a. What is the firm’s current ROE?
b. If the firm increased its net profit margin to 3.6%, what would be its ROE?
c. If, in addition, the firm increased its revenues by 23% (while maintaining this higher profit
margin and without changing its assets or liabilities), what would be its ROE?
2-44. Find online the annual 10-K report for Costco Wholesale Corporation (COST) for fiscal year
2015 (filed in October 2015).
a. Which auditing firm certified these financial statements?
b. Which officers of Costco’s certified the financial statements?
2-45. WorldCom reclassified $3.85 billion of operating expenses as capital expenditures. Explain the
effect this reclassification would have on WorldCom’s cash flows. (Hint: Consider taxes.)