#4 RA2 YR, April 2015 #8 RA2 YR, March 2015 #6 RA2 YR, November 2014 #3 RA2 YR, October 2014 #3 RA2 YR, September 2014 #2 RA2 YR, August 2014 #5 RA2 YR, June 2014 #4 RA2 YR, January 2013 #5 RA2 YR, August 2011
Hint: Place refineries as close to ore as possible.