Answer:
Debit Cash $900
Explanation:
The journal entry is as follows:
On April 7, 2021
Cash A/c Dr $900
   To Account receivable A/c $900
(Being the cash is received) Â Â Â
Since the cash is received so we debited the cash account and credited the account receivable as it reduces the account receivable balance. No discount is given as the party has not paid the payment within 10 days