$($a$)$ Describe the differences between level, chase, and hybrid strategy.

$($b$)$ Use the forecast in the table to show the differences by creating a plan of each type.

There is no beginning inventory and regular production capacity is $350$ units. Overtime

costs $$10$ extra and is limited to $50$ units per month. Subcontracting is limited to $100$

units per month and costs $$15$ per unit. Back orders cost $$40$ per unit and there is a cost

of $$5$ per month to hold a unit in inventory. There is room for only $100$ units in

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