b$)$ The aim is to improve the layout so that the total$$ "movement cost" can be reduced. Functional locations for Upper A

and Upper D

have been fixed. In the improved$$ layout, the work center that should be located between them$$ is:

A

C

D

$|$long dash

long dashlong dash$30$'long dashlong dashlong dash$|$long dashlong dashlong dash$30$'long dashlong dashlong dash$|$long dashlong dashlong dash$30$'long dashlong dashlong dash

$|$

$$

Part $6$

The cumulative distance based on the overall movement of parts between work centers for this layout$=$ enter your response here

feet $($enter your response as a whole$$ number$).$