hello,I need help wkth part B which is, what is the cumulative effect of the inventory error on total gross profit for the 2 years?

Current Attempt in Progress Concord Watch Company reported the following income statement data for a 2 -year period. Concord uses a periodic inventory system. The inventories at January 1, 2021, and December 31, 2022, are correct. However, the ending inventory at December 31,2021, was overstated $4,000. Your answer is correct. Prepare correct income statement data for the 2 vears. What is the cumulative effect of the inventory error on total gross profit for the 2 years? Curnulative effect of the imventory error \$