On the heels of Whole Foods’ store opening in the Upper West Side comes word that another eco-conscious food emporium is opening a new branch in Chelsea. Trader Joe’s will soon be heading to the Mattel Building at 675 Sixth Avenue on the corner of 22nd Street. The all-natural grocery store has just signed a lease for the former Barnes & Noble spot, which the Observer reports is 41,000 square feet and had an asking price of $200 per square foot. Gene Spiegelman, a broker with Cushman & Wakefield, reportedly represented the chain. With this store and another reportedly opening on 72nd Street, the tally of New York City Trader Joe’s stores will hit five.