Sales surged, especially online, as Americans stocked up
                                
                                
                                    (Newser) -
                                    The pandemic has brought  financial ruin  to  some   retailers . Not so with Walmart, whose sales boomed in the quarter that ended May 1, reports  CNBC . Overall, same-store sales were up 10%, but the details show how the coronavirus radically altered shopping patterns. For one thing, online sales rose a staggering...