Page Six may be compensated and/or receive an affiliate commission if you click or buy through our links. Featured pricing is subject to change. When in New York, schlepp like a New Yorker. Julia Roberts visited the Big Apple last week, keeping it casual in jeans, ballet flats and a cashmere striped polo for an outing on Wednesday. And a day earlier, the Hollywood icon rocked a monochromatic look featuring dark-wash denim paired with a sweater and blouse. Yet in both sightings, Roberts was carrying what’s become the A-list functional accessory: Alex Mill’s Perfect Weekday Tote. The canvas style is a chic update to the boat ‘n tote trend,…