I signed up for the citi aadvantage card that comes with a $100 statement credit if you buy something frm aa. I bought a $50 gift card on aa.com and did the required spending to get the sign up miles. Now my statement has closed with around $2500 and is due in a couple of weeks. But after the statement closed the $100 credit (for my aa.com purchase) posted. Do I need to pay the full statement amount to avoid interest or can I subtract the $100 credit and just pay ~$2400?

If I have to pay the full statement amount then I'll have a negative balance (-$100) and I'm trying to get spending in other cards.