On December 31, 2018, Kern Company adopted the dollar-value LIFO inventory method. All of Kern’s inventories constitute a single pool. The inventory on December 31, 2018, using the dollar-value LIFO inventory method was $600,000. Inventory data for 2019 are as follows: 

Dec. 31, 2019 inventory at year-end prices ....................$780,000
Relevant cost index at year-end (base year 2018) ..................120
Under the dollar-value LIFO inventory method, Kern’s inventory method, Kern’s inventory on December 31, 2019, would be:
a. $650,000
b. $655,000
c. $660,000
d. $720,000