The Following Data Is Available for an Item of JNC

Multiple Choice

The following data is available for an item of JNC Inc.for the month of March: $$\begin{array} { r l l } \text { March } 1 & \text { Inventory } & 15 \text { units at } \$ 10 \text { each } \\15 & \text { Purchase } & 30 \text { units at } \$ 18 \text { each } \\31 & \text { Purchase } & 24 \text { units at } \$ 15 \text { each } \\& \text { Sale } & 30 \text { units }\end{array}$$ ? ?Using the first-in, first-out method, what is JNC Inc.'s cost of ending inventory for March??

A) $630
B) $510
C) $420
D) $360