June 1999 Delay Per Departure	=	[8.8   7.5   6.4   5.5]
Change by Dec. 2000	=	3[-2   -1.5   -1.5   1.5]

Number of Departures

=

100 80 70 60

Total Delay	=	(1999 Delay Per Departure + Change) Number of Departures
	=	([8.8   7.5   6.4   5.5] + 3[-2   -1.5   -1.5   1.5]) 100 80 70 60
	=	[1,253]

Thus, the total delay is 1,253 minutes.

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