Ron owes a large settlement, but keeps his money stored in the form of gold and palladium. While the rest of the office thinks this is a really neat idea, they question whether he knows how much money he actually has since it’s not stored in paper money. Ron is confident in the weight of his money, but not its value.
The Parks Department lists London and many of them go sightseeing. Ron comes across a novelty postcard that he likes and tries to buy the postcard with American currency, but his money isn’t accepted. Despite the importance of the dollar on a global scale, this currency has little value to the shopkeeper.