Party Pizza Ordering

Hi all, my son has a birthday party on Saturday and I want to order some pizzas. If I’m ordering ten what’s the best way for me to give the store enough time? I’d need the pizzas for 1pm and don’t want to just toss the order on them an hour before.

Also, I assume there aren’t discounts for big orders like this? Too bad the $9.99 special isn’t around on March 1. 😂