Answer:
FIFO ending inventory = 22 units at $ 15= $ 330
Explanation:
FIFO means first in first  out. The units sold will have to be from the units first purchased.So the FIFO  ending inventory will have units from the last purchases.
Date     Units     Unit Cost      Total
1 Oct     36        $ 13.00      $ 468
5 Oct     24        $ 14.00       $ 336
12 Oct     34        $ 15.00      $ 510
15 Oct    72 units  Sold
Ending Inventory = Total Units  Less Sales = 94 - 72= 22 units
FIFO ending inventory = 22 units at $ 15= $ 330