A factory "MEG Scissors" is asked to produce scissors. The bill of material for the scissors,

its components and quantities are as follows.

Final Product $($Scissors$)$: Composed of $1$ unit of Item A $($Right Side$),1$ unit of Item B

$($Left Side$)$ and $1$ unit of Item $F($The screw$).$

Item A $($Right Side$)$: Composed of $1$ unit of Item C $($Right Blade$)$ and $1$ unit of Item E

$($Handle$).$

Item B $($Left Side$)$: Composed of $1$ unit of Item D $($Left Blade$)$ and $1$ unit of Item E

$($Handle$).$

The offset $($production lead time$)$ of the items are as follows $($Table$-1).$ The offset $($production

lead time$),$ and the current on hand inventory of each item $($at the beginning of day $1$ of the

delivery schedule$)$ are given in Table$-2$ below; the factory "MEG Scissors" is asked to

produce a total of $450$ scissors in $15$ days and the detailed delivery plan is given in Table $3.$

Table $1$: The Offsets of Items

Table $2$: On$-$Hand Inventory of the Items

Table $3$: The Requirements of Scissors

Provide the production requirements $($time$-$phased net requirements$)$ of item D $($Left Blade$).$