Regular$20$$$/$hour

Over Time $30$$ $/$hour Hiring $250$$ $/$employee Firing$400$$$/$employee Inventory Holding$10$$$/$unit$/$period Shortage $15$$$/$unit$/$period

Material $45\frac{\text{\$}}{?}$ unit$/$period

Capacity Workforce beginning $15$ employees

Inventory initial

$100$units

Production rate $10$hours$/$unit

Regular time $160$hours$/$period$/$employee

Over time available $4$ Ohours$/$period$/$employee

Month Demand

Jan$400$

Feb$400$

Mar$275$

April$325$

May$350$