Answer:
Date Account Titles and Explanation Debit Credit
15 Apr Cash $800
Bad debt expenses $1,200
To accounts receivables $2,000
(To writeoff bad debts)
07 Aug Accounts receivables $1,200
To bad debt expenses $1,200
(For reinstatement of earlier written off)
07 Aug Cash $1,200
To account receivables $1,200
(For receipt of cash from customers)