Originally Posted by
Stranger
Depends upon accounting assumptions.
If the J seat is empty anyway, cost is zero.
If you base your estimate on weight, extra cost is zero.
If you allocate extra dead weight for the extra space, then it's more.
Bottom line, accounting is an exercise of creative writing.

I'll refrain with what I think about accountants so I don't get banned
In all seriousness, the first few statements I disagree with. We are talking about a carrier surcharge, so the assumption is that the passenger will be taking up real estate on the aircraft, thereby occupying a seat, thereby nullifying statements 1 and 2. Because that pax will be sitting in a seat, the total weight of the pod and the pax is higher than a Y seat + the pax. So unless i'm missing something, the surcharge should be (and is) higher for the pax to fly in J than Y