My stock is as follows:

19 boxes of 11x14 fb (900 sheets)
9 boxes of 8x10 fb (900 sheets)
2 boxes of 20x24 fb (100 sheets)
9 boxes of 20x24 rc (450 sheets)
4 boxes of 16x20 fb (200 sheets)
9 boxes of 16x20 rc (450 sheets)
3 boxes of 5x7 rc (750 sheets)

I'm good for 2013 through 2015.
My problem is that I'm always adding fb paper as soon as I find good deals.