#3 TS, August 2011 #10 RA2, August 2010 #7 RA2, July 2010 #3 RA2, September 2009 #6 RA2, August 2009 #2 RA2, July 2009 #7 RA2, June 2009 #1 RA2, September 2008 #4 RA2, August 2008 #10 RA2, June 2008
Hint: Place refineries as close to ore as possible.