Answer:
1) 80%
2) The inventory value using the dollar-value LIFO retail method:
At the end of 2018 : $26,250
At the end of 2019: $24,600
Explanation:
1. The cost-to-retail percentage for the inventory on hand at 1/1/18 = inventory on hand of $15,000/ retail value of $18,750 x 100% = 80%
2. Please see the calculation for question 2 in excel attached