Retained earnings was zero on January 1, 2020. Here are account balances on Dec. 31. 2020. Remember/recall that common stock is an equity account that is different than retained earnings. What was the amount of net income for 2020? Cash $31 Inventory 16 Common Stock 10 Insurance Expense 8 10 Accounts payable 25 Notes Payable Cost of goods sold Rent Expense 24 Payroll Expense 12 9 Land 20 Accounts Receivable 15 Sales revenue 90 Previous Nex MacBook Air