Removal of fields from Items in T-code ME27
While creating a STO through T-code ME27 there are there are three fields i.e. Net price,Price Unit and Order Unit Price which is appearing in the items. How can I remove these fields. I have checked the 'Define Screen layout at Document Level ' in the spro MM--> Purchasing-->PO and it seems in order. Pls suggest how to remove these fields.