It’s not accurate though (see other comments). The one I’m amazed by is the assertion that “ The supermarket pays for everything on its store shelves (except, rarely, for certain new products on a consignment basis in which case it only sales for units actually sold)” which is leaving a lot of money off the table
Supermarkets might pay for the product, but Kellogg’s, Budweiser, etc pay them for shelf space, eye level, end of aisle placement, etc. there is a dozen ways they make money off the sellers. Supermarkets don’t just pay for product as a textbook marketplace