If you mean the egg supplier bulk discount, the discount will approach 50% but never reach it. It's impossible according to Niet's answer on a help tread I made a while back asking the same thing basically. Someone had rough % discounts on a per egg basis but I don't remember them. But I do remember in the best case scenario with a 25% dusky day you'll still need (I believe) slightly less than 5 mil to get 9 eggs at once. Worst case, about 6 mil. In short, sorry, it's going to be quite a bit more than 3.5 mil!