A job shop has four work centers: A$,$ B$,$ C$,$ and D that are currently located in an L$-$shaped facility as in locations $1,2,3,$ and $4$ as shown:

$\backslash$table$[[A$ in $1,B$ in $2,C$ in $3],[D$ in $4,,]]$

The distance in meters between each pair of locations are as follows:

$\backslash$table$[[,1,2,3,4],[1,-,70,160,240],[2,-,,70,85],[3,$longrightarrow,$-,,40],[4,-,,,-]]$

The loads moved between each pair of work centers per week are as follows:

$\backslash$table$[[,A,$B$,$C$,$D$],[A,-,15,30,60],[$B$,$longrightarrow,,$15,10],[$C$,-,,-,20],[$D$,$dots,,longrightarrow,$.]]$

Material handling cost is $$2$ per load per meter.

a$.$ What is the total material handling cost per week for the current layout?

$\backslash$table$[[$Week$,$Loads,Distance,Cost$],[1-2,70,15,=70**15**2$