Please explain how to fill in the blanks!

Here is the ledger for Carla Vista Co. Cash \begin{tabular}{lr|lr} \hline Oct. 1 & 8,780 & Oct. 4 & 2,180 \\ Oct. 10 & 2,760 & Oct. 12 & 3,280 \\ Oct. 10 & 9,780 & Oct. 15 & 350 \\ Oct. 20 & 800 & Oct. 30 & 400 \\ Oct. 25 & 3,780 & Oct. 31 & 600 \end{tabular} Accounts Receivable \begin{tabular}{lr|ll} \hline Oct. 6 & 900 & Oct. 20 & 800 \\ Oct. 20 & 1,020 & & \\ \multicolumn{4}{c}{ Supplies } \\ \hline Oct. 4 & 2,180 & Oct. 31 & 1,960 \\ \multicolumn{4}{c}{ Equipment } \\ \hline \end{tabular} Oct. 34,780 Notes Payable Oct. 109,780 Accounts Payable \begin{tabular}{ll|ll} Oct. 12 & 3,280 & Oct. 34,780 \end{tabular} Common Stock Oct. 18,780 Oct. 253,780 Dividends Oct. 30400 Service Revenue Oct. 6900 Oct. 102,760 Oct. 201,020 Salaries and Wages Expense Oct. 31600 Supplies Expense Oct. 311,960 Rent Expense Oct. 15350 Reproduce the iournal entries for only the transactions that occurred on October 1,10, and 20. (If no entin is renuired. select "No