Answer:
$510 is costs assigned to ending inventory
Explanation:
According to Last-In- First-Out method of inventory valuation , items of stock received last is sold first.
As a result, the sale of 390 units on January 26 is from the purchases of 25 January (110 units), January 9 (80 units) and 200 units from the purchase made on January 1st.
Above all, closing inventory is items bought on January 1st.
Value of closing inventory=150*$3.40=$510