Final answer:
To assess if there were errors in Sophie's checkbook register or if transactions had cleared, one must compare the register with the bank statement. Potential mistakes include incorrect amounts or missed entries. Transactions that are processed by the bank and shown on the statement are considered cleared.
Step-by-step explanation:
In order to determine if there were any mistakes in Sophie's checkbook register or if all the transactions had cleared, one would need to compare Sophie's register entries to her bank statement. Each entry in the checkbook register should be reconciled with the bank statement, verifying dates, amounts, and payees for checks, deposits, withdrawals, and any fees or interest earned. Mistakes in the register could include incorrect amounts, forgotten entries, or mathematical errors in the running balance. Transactions are considered cleared when they are processed by the bank and reflected in the bank statement balance.
However, without specific details about Sophie's checkbook register or her bank statement, it's not possible to confirm whether there were mistakes or if all transactions had cleared. Normally, a checkbook reconciliation process would involve checking off each cleared transaction in the register and identifying any discrepancies. Any checks or deposits not marked as cleared would be considered outstanding and need to be accounted for in the available balance.