To

From A B C D E F

A $-$

$8030855515$

B $-$

$5405560$

C $-$

$45535$

D $-$

$2565$

E $-$

$15$

F $-$

Part $1$

A law firm has its offices arranged according to the following layout:

A C E

B D F

The office manager for the law firm estimates that the following number of trips are made daily between offices.

Part $2$

a$.$ Assuming that it costs $$11/$unitary distance, the load$-$distance cost of the layout is

$$800$

Part $3$

b$.$ Suppose the law office manager proposes the following revised office layout.

Upper CC Upper FF Upper DD

Upper EE Upper AA Upper BB

Assuming that it costs $$11/$unitary distance, the load$-$distance cost of the revised layout is $?$