Using the gross requirements schedule below ${?}^{***},$ prepare an alternative ordering system that always orders $100$ units the week prior to a shortage $($a

fixed order quantity of $100).$ What is the cost of this ordering system?

$*$Holding cost $=$$$\frac{1}{?}$ unit$/$week; setup cost $=$$$150$; lead time $=1$ week; beginning inventory $=45$ units $.$

Prepare a net requirements plan $($enter your responses as whole numbers$).$