Prepare journal entries for each transaction listed. (If no entry is required for a transaction/event, select "No Journal Entry Required" in the first account field.)

a.	At the end of June, bad debt expense is estimated to be $15,400.
b.	In July, customer balances are written off in the amount of $7,700.

1) Record the estimated bad debt expense of $15,400.

2) Record the customer balances written off in the amount of $7,700.