Jammer Company Uses a Weighted Average Perpetual Inventory System and Reports

Jammer Company uses a weighted average perpetual inventory system and reports the following: $$\begin{array} { | l l | l | l | } \hline \text { August } & 2 & \text { Purchase } & 10 \text { units at } \$ 12 \text { per unit. } \\\hline \text { August } & 18 & \text { Purchase } & 15 \text { units at } \$ 15 \text { per unit. } \\\hline \text { August } & 29 & \text { Sale } & 20 \text { units. } \\\hline \text { August } & 31 & \text { Purchase } & 14 \text { units at } \$ 16 \text { per unit. } \\\hline\end{array}$$ What is the per-unit value of ending inventory on August 31?

A) $17.74
B) $13.80
C) $12.00
D) $16.00
E) $15.42