Re: Creating Purchase Order From Sales Order

On the both the Sales Pricing Condition type and the Purchase Pricing condition type there is a field called Ref.condit.type. 

For example you have a sales pricing condition PR00 with value $10. In your pricing condition in MM for example PB00 you enter PR00 in the Ref.condit.type. The value for PB00 will now be $10.

Apart from this i do not think there is any standard configuration available in SAP for this. Please refer to SAP Note-95024. You may also consider to write your own logic in the PO Exit to derive the sales order pricing in PO.