Zhou Company: APP Linear Programming $-$ Level Production, Overtime, and Subcontracting

$\backslash$table$[[$Quarter$,$Demand$],[1,12,000],[2,29,500],[3,14,000]]$

Regular Prod. Capacity $=15,000$ units$/$qto Overtime Prod. Capacity $=3,500$ units$/$qtr Subcontracting Capacity $=13,000$ units$/$qtr Inventory Capacity $,=18,000$ units$/$atr Beginning Inventory

Regular Prod. Cost $=$$$\frac{8}{?}$ unit

Overtime Prod. Cost $=$$$13/$unit

Subcontracting Cost $=$$$\frac{18}{?}$ unit

Inventory Cost $=$ $$7/$unitlatr

Linear Programming is to be used to determine the optimal mixture of Level Production, Overtime, and Subcontrac strategies.

How many decision variables are in the model?

$7$

$18$

$15$

$19$

$12$