Costco will raise its annual membership fees in the United States and Canada for the first time in seven years.Effective Sept. 1, in those countries, the retailer is adding $5 to the cost of its Gold Star (individual), Business and Business add-on memberships and adding$10 to the price of its Executive Memberships, Costco said in a Wednesday (July 10) press release.These changes will increase the price of those memberships from $60 to$65 and from $120 to$130, respectively, according to the release.“The f ...