Common use of BTU/LB Clause in Contracts

BTU/LB. If line 2a < line 2, then: {1 -{(line 2a) / (line 2)} * $0.2604/MMBTU {1—( )/( )} * $0.2604 = $ /MMBTU 7a) SULFUR: If line 3a is greater than line 3 [ (line 3a) – (line 3) ] * 0.1232/lb. Sulfur [( )—( )] * 0.1232 = $ /MMBTU 7b) ASH: If line 4a is greater than line 4 [ (line 4a) – (line 4) ] * 0.0083/MMBTU [( )—( )] * 0.0083 = $ /MMBTU 7c) MOISTURE: If line 5a is greater than line 5 [ (line 5a) – (line 5) ] * 0.0016/MMBTU [( )—( )] * 0.0016 = $ /MMBTU 52 XXXXXXXXX COAL COMPANY, INC. LG&E/KU Xxxxxxxx Xx. X00000 Total Price

BTU/LB. If line 2a < line 2, then: {1 -{(line 2a) / (line 2)} * $0.2604/MMBTU {1—1 - ( )/( )} * $0.2604 = $ /MMBTU 7a) SULFUR: If line 3a is greater than line 3 [ (line 3a) – (line 3) ] * 0.1232/lb. Sulfur [( )—) - ( )] * 0.1232 = $ /MMBTU 7b) ASH: If line 4a is greater than line 4 [ (line 4a) – (line 4) ] * 0.0083/MMBTU [( )—) - ( )] * 0.0083 = $ /MMBTU 7c) MOISTURE: If line 5a is greater than line 5 [ (line 5a) – (line 5) ] * 0.0016/MMBTU [( )—) - ( )] * 0.0016 = $ /MMBTU 52 XXXXXXXXX COAL COMPANY, INC. LG&E/KU Xxxxxxxx Xx. X00000 Total Price

BTU/LB. If line 2a < line 2, 11,300 BTU/LB. then: {1 -{(line — {(line 2a) / (line 2)} * $0.2604/MMBTU {1—1 — ( )/) / ( )} * $0.2604 = $ /MMBTU 7a) SULFUR: If line 3a is greater than line 3 2.75 LBS/MMBTU [ (line 3a) – — (line 3) ] * 0.1232/lb. Sulfur [( )—) - ( )) ] * 0.1232 = 0.1232= $ /MMBTU 7b) ASH: If line 4a is greater than line 4 10.73 [ (line 4a) – - (line 4) )] * 0.0083/MMBTU [( )—) - ( )] * 0.0083 = $ /MMBTU 7c) MOISTURE: If line 5a is greater than line 5 [ 11.75 LBS/MMBTU [(line 5a) – - (line 5) )] * 0.0016/MMBTU [( )—) - ( )] * 0.0016 = 0.0016= $ /MMBTU 52 XXXXXXXXX COAL COMPANY, INC. LG&E/KU Xxxxxxxx Xx. X00000 Total Price

BTU/LB. If line 2a < line 2, 10,900 BTU/LB. then: {1 -{(line - {(line 2a) / (line 2)} * $0.2604/MMBTU {1—1 - ( )/) / ( )} * *$0.2604 = $ /MMBTU 7a) SULFUR: If line 3a is greater than line 3 3.10 LBS/MMBTU [ (line 3a) – — (line 3) ] * 0.1232/lb. Sulfur [( )—-( )] * *0.1232 = $ /MMBTU 7b) ASH: If line 4a is greater than line 4 12..80 [ (line 4a) – — (line 4) )] * 0.0083/MMBTU [( )—) - ( )] * 0.0083 = $ /MMBTU 7c) MOISTURE: If line 5a is greater than line 5 [ 12.75 LBS/MMBTU [(line 5a) – - (line 5) )] * *0.0016/MMBTU [( )—) - ( )] * *0.0016 = $ /MMBTU 52 46 XXXXXXXXX COAL COMPANY, INC. INC LG&E/KU Xxxxxxxx Xx. X00000 Exhibit B Total Price

BTU/LB. If line 2a < line 2, 10,900 BTU/LB. then: {1 -{(line - {(line 2a) / (line 2)} * $0.2604/MMBTU {1—1 - ( )/) / ( )} * *$0.2604 = $ /MMBTU 7a) SULFUR: If line 3a is greater than line 3 3.10 LBS/MMBTU [ (line 3a) – — (line 3) ] * 0.1232/lb. Sulfur [( )—-( )] * *0.1232 = $ /MMBTU 7b) ASH: If line 4a is greater than line 4 12..80 [ (line 4a) – — (line 4) )] * 0.0083/MMBTU [( )—) - ( )] * 0.0083 = $ /MMBTU 7c) MOISTURE: If line 5a is greater than line 5 [ 12.75 LBS/MMBTU [(line 5a) – - (line 5) )] * *0.0016/MMBTU [( )—) - ( )] * *0.0016 = $ /MMBTU 52 46 XXXXXXXXX COAL COMPANY, INC. INC LG&E/KU Xxxxxxxx XxContract No. X00000 J10009 Exhibit B Page 2 of 2 Total Price