The president of ABC Enterprises, Andriana, projects the firm's aggregate demand requirements over the next $8$ months as follows:

$\backslash$table$[[$Jan$.,3,600,$May,$5,200],[$Feb$,4,000,$June,$5,200],[$Mar$.,4,400,$July,$4,400],[$Apr$.,4,400,$Aus.,$4,400]]$

D Her operations manager is considering a new plan, which begins in January with $1,200$ units on hand. Stockout cost of lost sales is $$200$ per unit. Inventiory holding cost is $$40$ per unit per month. Ignore any idle$-$time costs.

Plan A: Vary the workforce level to execute a strategy trat produces the quanifity demanded in the prior month. The December demand and rate of production are both $3,200$ units per month. The cost of hiring additional workers is $$10,000$ per $100$ units. The cost of laying off workers is $$15,000$ per $100$ units.