Hello! @baristas: I'm curious: do you always serve customers in the order they arrive \(in the store\) FCFS? That doesn't seem to be efficient. If someone orders a drink that takes a LONG time to prepare and the three customers behind that customer order drinks that can be prepared QUICKLY, don't you want to put the long drink aside, serve the three customers quickly first and then prepare the long drink? Otherwise, the customer with the drink that takes a LONG time holds up THREE other customers until the drink is finished. But if you put the long drink aside, customers are not served in the order they arrive \(FCFS\) and they might get upset... How do you deal with that? Thanks!