Posted on October 23, 2015 by Mireya Navarro in The New York Times The New York Times, By Mireya Navarro Once a month, Darlene Waters grabs her shopping cart and heads uptown from Chelsea to the Port Authority. Walmart and Sam’s Club beckon, just a bus ride away in Secaucus, N.J. “Right now, they are my two favorite stores,” she said. Ms. Waters doesn’t lack for shops in her neighborhood. But the marinara sauce her grandson likes — Paul Newman’s — goes for “$4 and some change” in Chelsea, she says, about double what it costs across the river. The same goes for toothpaste, rotisserie chicken, mozzarella for her baked ziti. And never mind cake. At Harbs, a bakery that opened last year on Ninth Avenue, a slice of strawberry cake goes for $10.