Henri Company's Inventory and Purchases Accounts Show the Following Data

Henri Company's inventory and purchases accounts show the following data: $\begin{array}{llrr}&&\text {Units }&\text {Unit Cost }\\\hline\text { Inventory, } & \text { January 1 } & 10,000 & \$ 9.20 \\\text { Purchases: } & \text { June 18 } & 9,000 & 8.00 \\& \text { Novermber 8 } & 6,000 & 7.25\end{array}$ A physical inventory on December 31 shows 3,000 units on hand. Henri sells the units for $12 each. Henri uses the periodic inventory method. The weighted-average cost per unit is

A) $8.00.
B) $8.60.
C) $8.30.
D) $8.15.