You and your friend have just done your shopping inside Costco and are pushing the cart toward the checkout area. Examining the multiple checkout lanes, each with its own cashier, you are trying to decide which lane will move faster. At this moment, you turn to your friend and tell him that according to what you learned in your finance class, the customer check-out experience would be better if there is only one checkout lane that leads to multiple cashiers at the end. Your friend stares at you for a while and then asks what the heck you mean by that. Explain to him.