Answer: $2,750
Explanation:
Relevant data is attached.
If they were using the First-in, first-out costing method, it means that the earlier goods would have been sold first.
If they sold 1,600 units, this means that the following were sold;
300 from the beginning inventory; 500 from the first purchase; 700 from the second purchase; and 100 from the last purchase.
The ending inventory is therefore 500 units from the third purchase;
= 500 * 5.5
= $2,750