ORDER TYPE: ZFD(Delivery FOC

Hi Friends.

In my standard system in VOV8 for order type ZFD(Delivery FOC), in the details screen for document pricing procedure instead of C it has been 2

C is for Free of Charge & 2 is for Returnable Packaging. In standard system it is C. I am unable to get why 2 is selected, is it valid if anybody can give valuable tip on this.

Thanks