Is it confirmed 660 cases?
Black Diamond Mojo - 144 cards, 5 of each card. 720 cards.
Ratio, 1 in 240 packets (Or 1 per case) - that says 720 cases.
Go the other way, 660 cases is 158,400 packets. With 720 cards that works out to be 1 in 220 packets. Either the ratios are wrong or there are...