Beyond Sonder and Marriott's messy breakup, employees and customers are paying the price

Steve RussolilloThis post originally appeared in the BI Today newsletter.You can sign up for Business Insider's daily newsletter here.Welcome back to our Sunday edition, where we round up some of our top stories and take you inside our newsroom. Do you have a little over $520 to spare? That's enough to buy one plain white T-shirt from Mary-Kate and Ashley Olsen's luxury brand, The Row. (And that's one of its most affordable items!) BI's Madeline Berg dives into why The Row's white tee costs so m