The Units of an Item Available for Sale During the Year

The units of an item available for sale during the year were as follows:? $\begin{array}{ccccc}\text { Jan. } 1 & \text { Inventory } &\quad~~~~~~~~~~~~&& 10 \text { units at } \$ 25 \\\text { Apr. } 4 & \text { Purchase } &&& 15 \text { units at } \$ 24 \\\text { May } 20 & \text { Purchase } &&& 20 \text { units at } \$ 28 \\\text { Oct } 30 & \text { Purchase } &&& 18 \text { units at } \$ 30 \\\end{array}$ There are 19 units of the item in the physical inventory at December 31. The periodic inventory system is used. Determine the ending inventory cost using LIFO.