Munson Manufacturing, in Gainesville, Florida, wants to arrange its four work centers so as to minimize interdepartmental parts handling costs. The flows and existing facility layout are shown in the figures below.

Figure $1.$ Parts Moved Between Work Centers

$\backslash$table$[[$Figure $1.$ Parts Moved Between Work Centers,,D$,,],[$A$,$B$,$C$,$D$,],[$A$,-,420,600,75],[$B$,375,-,175,0],[$C$,0,0,-,700],[$D$,0,0,0,-]]$

Figure $2.$ Existing Layout

$\backslash$table$[[$A$,$B$,$C$,$D$],[1-30-,-1-30-1-{30}^{\text{'}}-1,,]]$

a$)$ For the existing layout, the cumulative "load $$ distance" or "movement cost" $=$ feet $($enter your response as a whole number$).$