Matlack Company begins operations on January 1, 2022, with $100,000 in common stock. At the end of 2022, Matlack has the following financial information:

Common stock $100,00. Cash $40,000

Revenue $90,000. Account Receivable $25,000

Rent Expenses $20,000. Account Payable $40,000

Utilities Expenses $10,000. Salaries Expense $35,000

Equipment $90,000. Dividends paid $10,000

The change in retained earnings in 2022 was