Answer:
Dr retained earnings($21,600+$15,800) $37,400.00
Cr accumulated depreciation $21,600
Cr inventory $15,800
Explanation:
The errors that require adjustment are the overstatement and understatement of depreciation expense as well as the December 2021 overstatement of inventory.
The understatement of inventory in 2020 would have self-corrected itself in 2021 since closing inventory in 2020 deducted from costs of goods available for sale would be introduced as opening inventory in 2021.
net effect of depreciation=understatement -overstatement=$37,500-$15,900=$21,600.00
hence retained earnings would reduce by $21,600.00
for the overstatement of inventory,retained earnings would reduce by $15,800