What is the function of the adjustment key during a transaction?

The correct answer pertains to the capability of the adjustment key to reverse transactions that have been performed on different days. This feature is particularly important in retail settings like Costco, as it allows supervisors and cashiers to address customer concerns by accurately canceling or adjusting a previous sale that differs from what was intended.

This function fosters a level of flexibility and accuracy in transaction management. For example, if a customer realizes they made a mistake during a purchase or wishes to correct an error, the adjustment key enables a seamless process to rectify that without needing to start over with a new entry. Such functionality is essential for maintaining customer satisfaction and ensuring efficient operations in a fast-paced environment where transactions occur daily.

In contrast, other options focus on different aspects that do not directly relate to the specific purpose of the adjustment key. Speeding up the transaction process is generally achieved through various efficiencies but isn’t the direct role of this key. Applying discounts and managing returns, while important retail functions, typically involve other processes or systems that are separate from the transaction adjustment purpose.