Net Price of Contract is Zero

Hi,

We encountered a problem when we published a contract. the net price is reflecting zero in SAP. Checking in the contract, Order unit and order price unit is in Pounds (LB) but checking on the XML, the desired value for both should be Case (CS/CAS) We checked the outbound response in the XML file and we encountered "error in net price calculation item & (please correct)" What could be the right way to correct this so that the Net Price will reflect in the contract?

(BTW, Newbie here in SAP. Looking forward to hear from you guys.)