Answer:
C. $954,000
Step-by-step explanation:
Final inventory FIFO LIFO Difference
2017 640,000 560,000 80,000 
2018 712,000 636,000 76,000
Note: When method is changed to LIFO in 2018, it will effect ending inventory of 2018 only.
 
Net income as per FIFO $1,030,000
Decrease in income due to decrease -$76,000  
in the ending inventory as per LIFO 
Net income as per LIFO $954,000
So, a change to the LIFO method in 2018 would result in net income for 2018 of $954,000