Assume That Three Identical Units of Merchandise Were Purchased During

Multiple Choice

Assume that three identical units of merchandise were purchased during October, as follows:
$$\begin{array} { | l | c | l | c | c | } \hline & & & \text { Units } & \text { Cost } \\\hline \text { October } & 5 & \text { Purchase } & 1 & \$ 5 \\\hline & 12 & \text { Purchase } & 1 & 13 \\\hline & 28 & \text { Purchase } & \underline { 1 } & \underline { 15 } \\\hline \text { Total } & & & 3 & \$ 33 \\\hline\end{array}$$
-One unit is sold on October 31 for $28. Using the table provided, determine cost of goods sold under the average cost method.

A) $22
B) $17
C) $13
D) $11