0 values in the invoice proposal - what to do?
Zero values in the invoice proposal:

If the invoice proposal does not calculate properly and it only shows O-values, you have to check the CONTRACT if the packaging unit which has a 0 value is mentioned in the contract.
EACH packaging unit must be mentioned in the contract with an associated rate otherwise the system will not be able to find the correct rate!
If you would like to have more information, please check out the following links:
Invoicing & contracts fundamentals
Invoicing & contracts advanced