Final answer:
To handle transactions in a present booth, a cash register and credit card terminal are necessary devices for processing payments and reducing the staff needed to oversee multiple self-scan checkout aisles.
Step-by-step explanation:
If payments are taken in the present booth, cash register and credit card terminal must be added to handle transactions. Self-scan checkout aisles in markets provide an automated system where one cashier can oversee multiple aisles, this used to be a one-to-one job before the technology was implemented. The cash register is used to manage cash transactions and give change, while the credit card terminal processes card payments securely. These devices are essential for the functioning of a modern payment booth and help in reducing the number of employees needed, as transactions can be overseen by fewer cashiers.