Hampered by a calendar shift, Costco reported that comps were down during the month of March.
With average ratings of 67%, supermarket chains earned the highest level of trust in the 2015 Temkin Trust Ratings.
Costco sees a lift in second-quarter sales and net income benefits from a tax benefit.
Following its fallout with American Express, Costco reaches agreements with Citi and Visa.
Costco posted a sales gain for the month of January.
Costco posted net sales of $12.12 billion for the month of December, an increase of 5% from $11.53 billion in the year-ago period.
Costco reported a boost in first-quarter sales and net income.
Costco reported net sales of $9.43 billion for the month of November, a 7% increase from $8.79 billion during the similar period last year.
Drug Store News will be tweeting key messages from retail pharmacy industry heavyweights.
Robert Craves, a founding officer of Costco, died last week shortly after being diagnosed with cancer, The Seattle Times reported.