Union Fork, Inc. has five distribution centers located at the location coordinates given as follows. The demand at each center is also given.

DC

Coordinates

Demand

A

$(2,4)$

$10$

B

$(6,2)$

$15$

C

$(4,10)$

$25$

D

$(13,4)$

$30$

E

$(10,5)$

$20$

If a plant is located at a center of gravity, what is the load$-$distance score, assuming rectilinear distance?

less than or equal to $500$

more than $500$ but less than or equal to $550$

more than $550$ but less than or equal to $600$

more than $600$