Answer:
The extended warranty value $680000
The extended warranty period. 2 years.
Assuming that equal coverage has been given to each year. There for the revenue amount allocated for the first year of the extended warranty period is $340000. (680000/2 years)
Warranty cost incurred in 20x3 is $258000
Income = Revenue - cost
Income of 20x3 = 340000-258000=$82000
Income to be recognized is $ 82000.