Field help (PRIORDSRH) 

This is the unitary amount by stock unit that can be used to value the stock (if the valuation method for a customer return is Order price).
The valuation method for the stock is defined by product category or by product category as a function of the storage site. It can also be set up by movement type. This information can be manually modified if required, if the transaction authorizes it. This information can also be viewed in the stock detail window.

The order price is initialized as follows:

In both these cases, the order price cannot be modified.

If it is a direct return, the order price is not initialized but it is modifiable.