Mathematical Model: This model is similar to that of Example 2.3-5 in the general sense that
each month has its production, demand, and ending inventory.There are two exceptions: (1) accounting for the permanent versus the temporary workforce, and (2) accounting for the cost of
hiring and firing in each month.
Because the permanent 10 workers cannot be fired, their impact can be accounted for by
subtracting the units they produce from the respective monthly demand.The remaining demand,
if any, is satisfied through hiring and firing of temps. From the standpoint of the model, the net
demand for each month is