Monarch Company Uses a Weighted-Average Perpetual Inventory System,and Has the Following

Multiple Choice

Monarch Company uses a weighted-average perpetual inventory system,and has the following purchases and sales:
$$\begin{array} { | l | l | } \hline \text { January } 1 & 20 \text { units were purchased at } \$ 10 \text { per unit. } \\\hline \text { January } 12 & 12 \text { units were sold. } \\\hline \text { January 20 } & 18 \text { units were purchased at } \$ 11 \text { per unit. } \\\hline\end{array}$$
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What is the value of ending inventory? (Round average cost per unit to 2 decimal places,and final answer to the nearest dollar.)

A) $278.
B) $272.
C) $126.
D) $398.
E) $120.