The SUP Co. had a retained earning balance of $100 on 12/1/X1. SUP had the following transactions in December: 1. Issued common stock for cash, $50 2. Provided services to customers on account, $20. 3. Provided services to customers for cash, $9 4. Purchased equipment and paid cash, $43 5. Paid employees salaries for December, $15 6. Declared and paid a dividend, $8. What amount does SUP show for retained earnings on its 12/31/X1 balance sheet