Left images printing uses perpetual LIFO in valuing its inventory. The march first inventory was 36 units at six dollars each. Purchases and sales during March were as follows

March 10. Purchased 20 units at eight dollars per unit

March 17. Purchased 24 units at $10 per unit

March 5. Sales 15 units

March 15. Sales 26 units

The cost of the ending inventory was

A. $312

B. $424

C. $286

D. $330