A Company Markets a Climbing Kit and Uses the Perpetual

A company markets a climbing kit and uses the perpetual inventory system to account for its merchandise.The beginning balance of the inventory and its transactions during
January were as follows:
$\begin{array}{|l|l|}\hline \text { January 1: } & \text { Beginning balance of } 18 \text { units at } \$ 13 \text { each. } \\\hline \text { January 12: } & \text { Purchased } 30 \text { units at } \$ 14 \text { each. } \\\hline \text { January 19: } & \text { Sold } 24 \text { units at } \$ 30 \text { selling price each. } \\\hline \text { January 20: } & \text { Purchased } 24 \text { units at } \$ 17 \text { each. } \\\hline \text { January 27: } & \text { Sold } 27 \text { units at } \$ 30 \text { selling price each. } \\\hline\end{array}$
If the ending inventory is reported at $276,which inventory method was used?

A) LIFO method
B) FIFO method
C) Weighted-average method
D) Specific identification method
E) Retail inventory method