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Part $1$

The demand for subassembly S is $100$ units in week $7.$ Each unit of S requires $2$ units of T and $2$ units of U$.$ Each unit of T requires $1$ unitnothing of$$ V$,1$ unitnothing of$$ W$,$ and $2$ units of X$.$ Finally, each unit of U requires $2$ units of Y and $3$ units of Z$.$ One firm manufactures all items. It takes $2$ weeks to make$$ S$,1$ weeknothing to make$$ T$,2$ weeks to make$$ U$,1$ weeknothing to make$$ V$,3$ weeks to make$$ W$,2$ weeks to make$$ X$,2$ weeks to make$$ Y$,$ and $1$ weeknothing to make Z$.$

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Part $2$

Construct a gross material requirements plan $($type $0$ if the input box is not$$ used$).$

Week

Lead Time

Item

$1$

$2$

$3$

$4$

$5$

$6$

$7$

$($weeks$)$

S

Gross req

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$$Order release

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$2$