$2\mathrm{.}11.$ A company wants to develop a level production plan for a family of products. The opening inventory is $100$

units, and an increase to $130$ units is expected by the end of the plan. The demand for each month is given in what

follows. Calculate the total production, daily production, and production and ending inventory for each month.

$2\mathrm{.}18.$ For the following data, calculate the number of workers required for level production and the resulting month$-$

end inventories. Each worker can produce $9$ units per day, and the desired ending inventory is $800$ units. Why is it not

$33$ possible to reach the exact ending inventory target?