Social distancing markers and face masks will be as customary as doorbuster deals this Black Friday, as retailers in Delaware look to salvage some holiday business while keeping their customers and employees safe. “It’s as striking as it appears,” Mark Ryski, founder and CEO of Headcount Corp., a company that analyzes retail traffic, said last month. “What we’re seeing is a dramatic acceleration of trends that were substantially already underway….If you’re now just figuring out how to do it, you’re so far behind the curve, you’re going to struggle like hell.”