This story was originally published on Grocery Dive. To receive daily news and insights, subscribe to our free daily Grocery Dive newsletter. The Friday Checkout is a weekly column providing more insight on the news, rounding up the announcements you may have missed and sharing what’s to come. Costco has become a force to be reckoned with in grocery, boasting market share gains every year for the past five years. A big reason for that is the success of the club retailer’s private label juggernaut, Kirklan ...