Below is an example summary of this reading selection:
Dan Zevin narrates a shopping trip to Costco with his father, a doctor and an avid shopper who is well known and respected by Costco’s staff. As Zevin learns and masters his father’s shopping technique and sees his father’s proud response, he realizes a transition has taken place. His father sees his son as a fellow provider, an equal.
Your summary will differ from this one in the way it is written, but it should include roughly the same information.