Firewall signature / writing ....

Found a green grease pencil $ sign drawn on the oil pan of my 07 GT mustang I bought new. Car was special order. Was the $ sign in reference to that? Or was the dude who drew it on there working overtime and making extra money? There were also green grease pencil marks on the suspension bolts. Was he an assembly line inspector? Who knows. Wierd **** happens. Person who wrote their signature on your firewall might be still alive. Who knows