Purchase Price
The purchase price during the registration of the purchase order sometimes surprises the users. What is this surprise about, well despite the lack of a price list (information record) and no value entered into the field, the price appears by itself. What’s more, not only the price is completed, but also the entire data set regarding, for example, freight and other parameters registered under the price conditions. So where does this data come from? The price and other price conditions are completed in the purchase order document as a result of the automatic copying of the purchase price elements from previous purchase orders, which is a standard functionality of the system.
For those who are not fully satisfied with this function, the SAP has prepared the configuration which allows setup the Default values at Purchasing section.
Materials Management -> Purchsing -> Enviroment Data -> Define Attributes for Buyers
Settings for Default Values
One of the parameters set in the ‘Default values’ object is the method of managing the purchase price. Two default entries (01 and 02) are delivered as standard one in the system. In order to prepare your own settings in the Default values, it is worth copying the standard one, e.g. 01 to Z1 and making adjustments there.

Fig.1
There are three options:
Always copy – the price from the previous purchase order will be copied and the price entered by the user will be even manually overwritten with the price from the previous order
Not if price entered manually – the price entered manually by the user will not be overwritten with the price from the previous order.
Do not copy – the price will not be copied from the previous order and will not be overwritten after manual input by the user
The Default values are the Parameter values to be assigned to the EVO parameter in user parameters in SU3.

Fig.2