Table 1: The data of each demanding point.

Demanding Point Sum of Demanded
Material
Transportation Fee of Unit Distance Coordinate of Security The Urgency of the
Demanded Security
A 500 75 (120,80) 5
B 80 42 (340,-150) 3
C 300 130 (-550,-800) 1
D 1200 35 (-460,713) 7
E 600 80 (661,90) 8
F 1500 60 (125,-190) 5
G 900 55 (-760,845) 6
H 120 30 (-321,-546) 2