Why are all the prices in the CancelRequest message negative values?
This is a reminder/or a convenience that if you accept the Cancel Request, you need to remove these values from the prices you display on the packing slip. One way to do this is to take the values that were on the original Fulfillment Request sent to you, and ‘add’ the prices on the Cancel Request. Since the Cancel Request prices are negative, the correct values will show up on the packing slip.