Go Grandma, with the environmentally sound grocery bag
Today's strip is from the suggestion of pogoer! I'm sure you're pumped to see it, and that you're treasuring the interaction with Al. Do you remember how your worded the suggestion? Honestly, I find that conversion fascinating. Al generally kept things pretty close to the suggestion.
Is the word "wagon" for a grocery cart common? I've always said "shopping cart" and have never heard "wagon." (Well, obviously, I've heard the word "wagon" before. But not in this context.) And really, by the time they've reached the parking lot, I think both Grandma and Biff Biceps have realized that there'd be no wagon/cart. (Side note: I hate those grocery stores that don't allow carts in the parking lot. Insanely inconvenient.)
It is a crap situation, but maybe Grandma should've asked someone when she was checking out. That's normally when you encounter the question of whether you need help. Though I do acknowledge that my purchases are more along the line of Biff's than Grandma's when the issue arises.