Yes - the cost is mostly testing and building an audit trail. If every single part of the toilet has to be manufactured from raw materials, and fully tested an

Yes - the cost is mostly testing and building an audit trail. If every single part of the toilet has to be manufactured from raw materials, and fully tested and documented at each step of the manufacturing process, then a toilet can add up to $20k easily. Also, anything that will be installed in a regular old non-military passenger plane is extremely expensive, because they must be able to prove that parts will not break off mid-flight, that it will not catch fire, and will be manufactured consistently and reliably.