The cost of goods sold (COGS) per unit can be calculated as follows:
COGS per unit = Cost to purchase + Cost to sell = $43 + $47 = $90
Therefore, the total cost of goods sold for 15,000 units would be:
Total COGS = COGS per unit × Number of units sold = $90 × 15,000 = $1,350,000
The inventory balance at the end of the year can be calculated as follows:
Inventory balance = Number of units on hand × Cost per unit
Since the inventory balance needs to be reported at the lower of cost or net realizable value, we need to compare the cost per unit ($43) with the net realizable value per unit ($80 - $47 = $33).
Since the net realizable value per unit is lower than the cost per unit, we need to use the net realizable value to value the inventory.
Therefore, the inventory balance on the balance sheet date would be:
Inventory balance = Number of units on hand × Net realizable value per unit
= 15,000 × $33
= $495,000
Therefore, the correct answer is (d) $495,000.