The demand for subassembly $S$ is $90$ units in week $7.$ Each unit of $S$ requires $1$ unit of $T$ and $1$ unit of $U.$ Each unit of T requires $1$ unit of $V,2$ units of $W,$ and $1$ unit of $x.$ Finally, each unit of $U$ requires $2$ units of $Y$ and $2$ units of $Z.$ One firm manufactures all items. It takes $2$ weeks to make $S,2$ weeks to make $T,2$ weeks to make $U,2$ weeks to make $V,2$ weeks to make $W,1$ week to make $x,2$ weeks to make $Y,$ and $1$ week to make $Z.$

Click the icon to view the product structure and the time$-$phased product structure.

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