How to find December 31st balance?

1 Required information [The following information applies to the questions displayed below.] Santana Rey created Business Solutions on October 1, 2021. The company has been successful, and its list of customers has grown. To accommodate the growth, the accounting system is modified to set up separate accounts for each customer. The following chart of accounts includes the account number used for each account and any balance as of December 31, 2021. Santana Rey decided to add a fourth digit with a decimal point to the 106 account number that had been used for the single Accounts Recelvable account. This change allows the company to continue using the existing chart of accounts