Chesapeake, Va. — Variety store chain Family Dollar will close 390 stores this year and make changes to the stores it is keeping open as the retailer seeks a turnaround. Dollar Tree Inc., which purchased Family Dollar in 2015 for nearly $9 billion in cash and stock, plans to revitalize the brand with store closures and a rebranding of some locations to Dollar Tree. In addition, some locations will be renovated to include $1 Dollar Tree merchandise sections. Family Dollar sells a variety of items for under $10 at rural …