If the population of the community was 1,000, then the overall attack rate was 18 â 1,000 Ã 100% = 1.8%. One incubation period later, 17 persons in the same households as these primary cases developed shigellosis. If the 18 households included 86 persons, calculate the secondary attack rate.
And Sam's Club is not a cheapest-of-the-cheap outlet. You need a membership to shop there, a privilege that comes with a $45 yearly membership fee. That's cheaper than Costco's $55 a year, but it's still an expense. If it's true that Sam's Club is relying on customers who need food assistance, Landes said, then it's not clear if they have the right merchandise for that consumer.
As of January 31, 2008, Sam's Club ranks second in sales volume among warehouse clubs with 57 billion in sales behind Costco, despite the fact that Sam's has more retail locations. Sam's Club had sales of $57.157 billion in FY 2014. It reported a 0.3% sales increase in 2014, 4.1% in 2013, and 8.4% sales increase in 2012. This is significantly higher growth than Walmart U.S. stores, which did not have higher than 2% growth since 2010. Its major competitors are Costco and BJ's Wholesale Club. As of January 31, 2014, Sam's Club operated 621 membership warehouse clubs in 48 U.S. states and Puerto Rico. Oregon and Vermont are the only states where Sam's Club does not operate. It also operates 27 locations in Brazil and 11 in China.