- The ending Retained Earnings balance at December 31, 2021, is calculated as follows:
\[
\text{Ending Retained Earnings} = \text{Initial Retained Earnings} + \text{Net Income} - \text{Dividends Paid}
\]
\[
\text{Ending Retained Earnings} = 0 + 3,500 - 2,100 = 1,400
\]
The ending Retained Earnings balance at December 31, 2021, is $1,400.