Most US retailers reported weak sales in February despite unseasonably warm weather, a possible result of delayed tax refunds. Sales at retailers nationwide rose a scant 0.1% in February, slowing sharply after big gains the prior two months, the Commerce Dept. said. Among retailers still reporting monthly sales, L Brands was down 13.0% and Costco was up 5.0% Gap has shifted to quarterly reporting. See our sales reports below.