Answer:
Cash debit 1,200
Note Receivable debit 2,800
Account Receivable credit 4,000
Explanation:
The accounting will reflect the receipt of cash and the note at their principal.
The interest of the note will ge accrued with the past of time. Currently no interest was earned, so we don't have to post anything related to the interest of the note.
We just write-off the account receivable of the customer and declare how we settle.