Primark, which carries women’s, men’s and kids’ apparel and footwear, as well as accessories, beauty products and home goods, all under its own brand, is planning to compete aggressively on price with some of its fast fashion and off-price neighbors. Signs on sales racks advertised $20 jeans, a $7 one-piece swimsuit and 90-cent flip flops. The most expensive item in the store is a $60 extra-large suitcase.