I made changes to the calculation:

It takes Tesla 1 week to deliver cars. That's why the wait time never drops below 1 week. Therefore we should subtract 1 week from the wait time before converting it to units. In other words, 1 week wait time now means zero backlog.

Part 2/2 pic.twitter.com/cIWVD3uCin

— Troy Teslike (@TroyTeslike) October 6, 2022