Amber Company Uses the LIFO Retail Inventory Method and Reports

Amber Company uses the LIFO retail inventory method and reports the following information: $\begin{array}{lcc}&\text { Cost }&\text { Retail }\\\text { Beginning inventory } & \$ 540 & \$ 900 \\\text { Net markups } & & 1,000 \\\text { Sales } & & 4,500 \\\text { Net markdowns } & & 500 \\\text { Purchasess } & 3,150 & 4,000\end{array}$ What is the cost of ending inventory for Amber Company?

A) $540
B) $580
C) $630
D) $900