By Veronika Bondarenko The chain recently attributed its strong earnings to its high-income customers. There are ample social media memes and even t-shirts about the “splurge” of paying $1.95 for guacamole at Chipotle (CMG) – Get Chipotle Mexican Grill Inc. Report \– the creamy topping is, for most people, the best part of the dish, but an annoying extra cost that gets tacked on at the end. But jokes aside, those little “extras” are increasingly becoming the dividing line between the wealthy and the non-wealthy customer. Professional golfer Viktor Hovland recently even told a journalist that …