A firm's balance sheets for the last two years are as follows: Year 2019 Assets Liabilities and Equity Cash $ 9,000 Accounts payable $12,000 Market securities 10,000 Accruals 10,000 Accounts receivable 21,000 Current bank note 10,000 Inventory 20,000 Long-term debt 30,000 Plant 40,000 Common stock 14,000 Retained earnings 24,000 $100,000 $100,000 Year 2020 Assets Liabilities and Equity Cash $12,000 Accounts payable $12,000 Market securities 18,000 Accruals 10,000 Accounts receivable 18,000 Current bank note 30,000 Inventory 10,000 Long-term debt 10,000 Plant 42,000 Common stock 18,000 Retained earnings 20,000 $100,000 $100,000 Sales in 2019 were $500,000. Sales in 2020 were $500,000.