What is an extra cost added on the original cost of an item?

An extra cost added to the original cost of an item is often referred to as a markup or an additional charge. This can include taxes, shipping fees, handling fees, or any other surcharges that increase the final price paid by the consumer. Such costs can vary based on factors like location, retailer policies, or product type. Understanding these additional costs is essential for evaluating the total expense of a purchase.