I always wonder why people settle on a number like 49,000 when 50,000 is sitting right there, looking you in the face.
49,000 is just as a specific as 48,624 is.
Besides it sounds like they were specifically looking at quarterly amounts of EVs sold when they made the deal
There are some theories of negotiation that say it's good to pick an overly specific number like that specifically to imply that you've given it thought and aren't willing to change it without getting something in return.