Cam Newton: Guess How Much My Sweatshirt Cost? (Hint: Expensive)

He's already got the $850 Versace pants ... and now, Cam Newton's rocking a swagged out sweatshirt that's EVEN more expensive ... TMZ Sports has learned.

Cam's tape deck top was hard to miss at LAX this week -- so we did some digging to find out which designer was behind the swag.

Turns out, it's a Givenchy ... one of Kanye's favorite labels ... and it comes from the Spring 2014 collection.

So, how much?? A Givenchy employee told us it retailed for around $950!!!!