Impossible to unlock Magical Exchange 2??!

It says that exchange 2 will be unlocked if “all the limited items in Exchange 1 have been exchanged.”

I did some quick math and it doesn’t seem to add up to the amount of magical crystal (mc) we can gather?…

Armament apps: 68 (limit) x 10mc = 680mc x 4 characters = 2720mc

Then decoder chips: 132 (limit) x 20mc = 2640mc

and the heart of hope: 640 (limit) x 5mc = 3200mc

So in total you’ll need 8560mc to clear out all of the exhaustible items in exchange 1.

Then we go check the mc we can gather from all 6 rounds of trading (25x26x2)+(25x28x2)+(25x30x2)=4200mc

The mc we can gather from all of the event quests is 960

Lastly there’s the daily quest which is 90mc per day, and the event ran about 2wks so 90x14=1260

As you can see even if you farm all of the mc available you are only at 6420.

So how is it possible for anyone to clear all of the exhaustible items in exchange-1??

Did I do my math wrong? Am I misinterpreting something? or am I missing some mc that you can farm?!