Answer:
Please, for answer see attached file.
Explanation:
The difference will be between the gross profit in the years 2016 and 2017, because of the error. This is because the error will cause a difference in the cost of sold goods.
In the year 2018, there will be no difference because the beginning inventory and final inventory are right.
But, for the three-year period, there will no be a difference in the total, because both, beginning and final inventory are correctly registered.