I would hope that when you locked in the build so was the price you would be charged, especially if you arrived at an agreed upon price at the Dealership.
Just checked my build sheet from November. Infotainment was $1295 when I ordered, $1395 by the time it arrived on January 17th and now it's $1495. (The dealer did give me the as ordered price) . But it's definitely up $200 from day 1.