There’s something useful that can be done with those plastic grocery store bags after all.McMinnville resident Faye Sharpe is turning them into sleeping mats that can be used by the homeless. She says it takes about 750 plastic bags to make one large mat.“This can make a difference if you’re homeless and sleeping under a bridge,” said Sharpe. “This mat will feel a lot better than sleeping on concrete.”Sharpe, 86, has been crocheting for most of her life.