"$30," I replied.
"Oh, I was just asking because I know they're $15 at [Warehouse Superstore]."
"I'm sure they are. Of course, after the twenty minute drive to get there, circling ten minutes to find a spot to park, then another ten minutes just trying to weave your way to the back to the pharmacy, only to be told the wait time is going to be twenty to thirty minutes BEFORE they can even get to you to give you the shot, I think it is worth $15 more to not go through that hassle."
<bewildered look, not comprehending at all what I just said>
The lady walks off.
Good luck at [Warehouse Superstore] I thought.