Which of the following are codes that you can use to add charges that are associated with purchase orders, for example, freight?

The correct choice is charges codes, which are specifically designed for managing additional costs that are incurred in conjunction with the purchase of goods on purchase orders. Charges codes allow you to define various types of costs such as freight, handling, or other miscellaneous charges that may need to be added to the total purchase order cost.

Using charges codes helps organizations accurately account for all expenses associated with procurement, ensuring better budgeting and financial reporting. They can be configured in the system to automatically calculate and apply additional fees as part of the purchasing process.

Other choices do not serve this specific purpose: item codes are related to inventory and product identification, tracking codes are utilized for monitoring and tracing items through the supply chain, and sales codes pertain to the sales process, none of which specifically address the addition of charges to purchase orders.