Answer:
June 20
Cash $3,960 (debit)
Discount allowed $40 (debit)
Trade Receivable $4,000 (credit)
Explanation:
The sale journal is as follows :
June 12
Trade Receivable $4,000 (debit)
Sales Revenue $4,000 (credit)
The payment journal will be :
June 20
Cash $3,960 (debit)
Discount allowed $40 (debit)
Trade Receivable $4,000 (credit)
Note
That the customer was granted a discount period of 10 days and they managed to repay the amount owing in that period by June 20, so they are eligible for a cash discount of 1 %.