Ok. I will buy 20 BCs (which will cost $20)
I use 14 of my BCs and buy 7 UCs (which will cost $35)
I use 2 of my UCs and get 2 CCs (This will cost me 24$)
I use my 2CCs and my 5UCs and get a RC (this will cost me $20)
I buy 25BCs (This will cost ($25)
I use 8BCs and get 4UCs (This will cost $20)
Now I have 17BCs, 4UCs and 1RC