Lululemon sues Costco over alleged sale of 'dupes' copying $128 pants — priced at just $10

Athletic apparel giant Lululemon is suing Costco for allegedly selling cheap “dupes” of its pricey pants and sweatshirts. In a lawsuit filed Friday in California, Lululemon alleges Costco has “unlawfully traded” on the brand’s “reputation, goodwill and sweat equity by selling unauthorized and…