Use the Following Data to Calculate the Cost of Ending

Use the following data to calculate the cost of ending inventory under average cost method. $\begin{array}{lll}15 \text { units at } \$ 20 \text { each } & \text { Beginning Inventory } & \text { September 1 } \\20 \text { units at } \$ 25 \text { each } & \text { Purchase } & \text { September 10 } \\25 \text { units at } \$ 28 \text { each } & \text { Purchase } & \text { September } 20 \\30 \text { units } & \text { Ending Inventory } & \text { September } 30\end{array}$

A) $825
B) $600
C) $675
D) $750