i need ro lnow the addition to retained earnings in the year 2020

Company Corporation 2019 2020 Cash 400 500 Cost of Goods Sold 600 700 Debt (LT) 5000 5300 Depreciation 300 300 Dividends 325 350 Interest Expense 400 450 Inventories 1500 1800 Investments (ST) 1250 1350 Loans from Bank (ST) 450 450 Payables 3000 2600 Property, Plant, Equipment 4800 5450 Receivables 600 550 Research and Development 250 250 Revenues 6900 7350 Salaries 3000 3000 Sales and Distribution 400 350 Shareholders' Equity 100 1300 * All values given are in 1000s of dollars. Asset values are net of depreciation. 5. What was the addition to retained earnings for 2020