Estimated cost   Out-turn cost   Ratio
81   	  	 94	  	 1.16
20   		 18   		 0.90
98   		 107   		 1.09
79   		 75   		 0.95
69   		 52   		 0.75
144   		 216   		 1.50
119   		 176   		 1.48
124   		 207   		 1.67