These eco-costs are extremely low. But the problem is that ecocosts
as such are not a good basis for benchmarking of these seats.
The reason is the “functional unit” in LCA (the functional unit relates
to the function of a product). The function of these seats is not
only that you can sit on it, but also that it is a high end design
product (such a chair has also a decorative function). So the basis
for benchmarking is not “eco-costs per 10.000 times you sit on it”,
but “eco-costs per its value” (the value is a measure of the quality
and beauty perceived by the consumer, it is the WTP).
The ranking is then: