50 Bc

[binTravkin]

Most of them are in Strategic planning thread.

From the last one:

http://apolyton.com/forums/showthread.php?s=&threadid=158598&perpage=30&pagenumber=12

http://apolyton.com/forums/showthread.php?s=&threadid=158598&perpage=30&pagenumber=10

http://apolyton.com/forums/showthread.php?postid=4935961#post4935961

And so on..

I think it would be rather complicated to make a full excel implementation since you need to be flexible - change the production around to see what comes out of it.