E.g. smoke alarm, "£24,950.00/kg".
https://www.amazon.co.uk/Kidde-233045-Smoke-Alarms-Battery/dp/B07FRZ1NQF
Its is not even remotely accurate mathematically.
https://www.amazon.co.uk/Kidde-233045-Smoke-Alarms-Battery/dp/B07FRZ1NQF
Its is not even remotely accurate mathematically.