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Answer$($s$)$: $($Your response$($s$)$ are shown below, followed by the correct answer$($s$).)$

The nroduct structure for nroduct $x$ is illustrated helow.

The lead time for manufacturing any number units for an item and the required number of units for the lower level part in the product structure are reported in the following table. For example, each unit of Part $x$ requires $1$ units of $P$ art $C$ and, in turn, each unit of Part $C$ requires $2$ units of Part $H.$

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

$140$ units of product $x$ are to shipped at the end of week $23.$ There is no inventory on hand.

How many units of part $N$ are required for production?

$2240$ Specify only the number.

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Note that Part K appears at levels $2$ and $3.$