Default Early upgrade at Best Buy Question

I have a question regarding AT&T early upgrade at Best Buy store.

Let's say I'm eligible for Early Upgrade on a line. Now AT&T will charge for Galaxy S4 $199+$200 Early upgrade fee. Now question is on bestbuy they are doing a promotion for 2 year extension on contract (upgrade), Galaxy S4 for $49.99 Now if I do early upgrade with BB, will I be eligible for this price of $49.99 + $200 (Early Upgrade Fee at Best Buy) or will pay standard $199 + $200? Thank you all in advance for reading and answering my question.

Sent from my iPhone using Tapatalk