what are the best things to buy at costco?
['Cheese. ... ', 'Chicken. ... ', 'Frozen fruit. ... ', 'Olive oil. ... ', 'Maple syrup. ... ', 'Snack foods. ... ', 'Vanilla. One of the best deals at Costco is on vanilla extract, Demer says. ... ', 'Wine. “The wine is absolutely one of the best deals,” Demer says.']