Data Sources
1. The Georgia f.o.b prices, skinless boneless breast prices, leg quarter prices and Total Q are from Georgia F.O.B. Dock: www.agr.georgia.gov
2. The corn prices and soybean meal prices  from 01/03/2003 to 11/02/2007 are from the CBOT CDs
3. The corn prices and soybean meal prices from 11/09/2007 to 08/22/2008 are from Wall Street Journal:  www.wsj.com
Caculation
1. Corn($/Lb)=Corn(cents/bu)/5600
2. Soybean meal($/Lb)=soybean meal($/ton)/2000
3.Cost($/Lb)=[0.7*Corn($/Lb)+0.3*Soybean meal($/Lb)]*1.75/0.725 
4.Quasi Benefit($/Lb)=Georgia f.o.b dock(cents/Lb)/100-cost($/Lb)
5.The dates highlighted as yellow means the Weekly Slaughter Volume is lost and we replace it with the average of the slaughter week before and the next week.