ID Inventory Models for Independent Demand

For a certain item, the cost$-$minimizing order quantity obtained with the basic EOQ model is $200$ units, and the tofal annual inventory $($carrying and setup$)$ cost is $$400.$ What is the inventory carrying cost per unit per year for this item?

$$1\mathrm{.}00$

$$2\mathrm{.}00$

$$3\mathrm{.}00$

$$150\mathrm{.}00$