Answer: $1226400
Step-by-step explanation:
The cost of the ending inventory at December 31, 2020 under dollar-value LIFO will be calculated as:
= $1010000 + [($1287000/106 × 100) - $1010000] × 106/100
= $1010000 + ($1214151.4 - $1010000) × 1.06
= $1010000 + ($204150.94 × 1.06)
= $1010000 + $216400
= $1226400
Therefore, the cost of the ending inventory at December 31, 2020 under dollar-value LIFO is $1226400.