Can you explain further? Because this makes no sense on its face. If they get a discount on what the grocery store charges, then the final price after their markup should be closer to the store's price, not further.
His insinuation is that the "Instacart receipt" that the customer received is the discounted one that reflects the bulk discount. If an individual went to the store and got the same list of items, it would be more expensive, so the markup wasn't $140 - $80 but more like $140 - $100.
I have no idea if that's true or not..