例4.1 原始数据表(a)
Seattle
Detroit
Chicago
Denver
COST
12
28
15
20
NEED
1600
1800
1200
1000
SUPPLY
1700
1900
1300
1100
ORDERED
例4.1 原始数据表(b)
COST
NEED
SUPPLY
ORDERED
Seattle
12
1600
1700
Detroit
28
1800
1900
Chicago
15
1200
1300
Denver
20
1000
1100