B Read a passage and choose the best answer. P57 Cash bars are essentially very similar to regular outlet beverage sales, where each individual customer has to pay for his or her own drinks. In most cases, a cashier is provided for control of cash bars, using a ticket system. There are a limited number of different prices for the various categories of drinks served. For each price there is a different colored ticket. Either the guest or the server will purchase the appropriate ticket from the cashier and present it to the barman in order to obtain the drink required. With the sale of cash bars, it is especially important to have an accurate record of the quantities consumed, so that the potential sales valve of consumed, so that potential sales valve of consumption can be compared with actual cash receipts. 2. How are the different prices identified?