Final answer:
Walmart had a higher gross margin (25.36%) compared to Costco (13.29%), while Costco had a slightly higher net profit margin (2.08%) than Walmart (1.97%). However, Walmart was more profitable in terms of total dollars gained in 2017.
Step-by-step explanation:
Comparing the profitability of Walmart (WMT) and Costco (COST) involves calculating their gross margins and net profit margins for the fiscal year 2017.
Gross Margin Comparison
Gross margin is calculated as (Gross Profit / Revenue) * 100. For Walmart: ($126.95 billion / $500.34 billion) * 100 = 25.36%. For Costco: ($17.14 billion / $129.0 billion) * 100 = 13.29%. Thus, Walmart's gross margin is higher than Costco's.
Net Profit Margin Comparison
Net profit margin is found by (Net Income / Revenue) * 100. Walmart's net profit margin is: ($9.86 billion / $500.34 billion) * 100 = 1.97%. Costco's net profit margin is: ($2.68 billion / $129.0 billion) * 100 = 2.08%. Costco has a slightly higher net profit margin than Walmart.
Overall Profitability
Although Costco has a higher net profit margin, Walmart had a significantly higher gross profit and net income in absolute terms. Therefore, Walmart was more profitable in terms of total dollars gained in 2017.