Answer:
a. $65,000.
Step-by-step explanation:
since the price index for year 20x0 is 1, then the inventory balance using dollar value LIFO = $65,000 / 1 = $65,000.
Dollar value LIFO works in cost layers, or pools of inventory.
E.g. the 20x1 inventory would be worth:
($126,000 / 1.05) = $120,000
($120,000 - $65,000) x 1.05 = $57,750
value of 20x1 inventory = $65,000 + $57,750 = $122,750