The inventory records of a corporation provided the following information at the end of $2023$:

Cost per unit

$$10,000$

Insurance premium paid per unit

$500$

Financing expense per unit

$600$

Cost of permanent security system per unit $($allocated$)$

$1,500$

Freight per unit $($when purchased$)$

$300$

Cost of permanent reusable display case for this product only, per unit

$400$

Advertising expense per unit $($allocated$)$

$1,000$

What unit cost should be used for valuing inventory on hand at the end of $2023?$