A tool used to determine the precise amount of currency a customer should receive after making a purchase, especially when tendering a larger denomination than the purchase price. For instance, if an item costs $12.50 and a customer pays with a $20 bill, the device or method calculates that $7.50 should be returned.
Accuracy in financial transactions is paramount for both businesses and consumers. Such calculations, whether performed manually or electronically, ensure transparency and trust. Historically, these computations were done mentally or with the aid of mechanical cash registers. Modern implementations often involve sophisticated point-of-sale systems that automate the process, reducing the likelihood of errors and improving transaction speed.
