$\backslash$table$[[$Part$,\backslash$table$[[$Lead Time$],[($in weeks$)]],\backslash$table$[[$Required$],[$number of$],[$units$]]],[$B$,1,2],[$C$,1,1],[$D$,2,1],[$H$,2,2],[$K$,3,3],[$M$,2,3],[$N$,3,2],[$X$,2,1],[$Z$,4,2]]$

$140$ units of product $x$ are to shipped at the end of week $18.$ There is no inventory on hand.

How many units of part N are required for production?

Specify only the number.

CHECK ANSWER