A luxury grocery store frequented by wealthy Californians has been mercilessly mocked online for charging ludicrous prices for the most basic, everyday items. Erewhon Market has eight locations in Los Angeles' most affluent neighborhoods, all with a focus on locally sourced, vegan and organic food catering to niche diets. Products on its shelves include $20 raw milk, a $26 bottle of 'oxygenated' water and hot sauce costing as much as $40. It's also known for selling upmarket prepared foods, like its popular buffalo cauliflower and collard green wrap, which sells for $15.95. The premium grocery store started in Boston in...