Answer and Explanation:
The journal entries are shown below:
On Mar 11
Bad debt expense $8,100
To Account receivable $8,100
(Being bad debt expense is recorded)
On Mar 29
Account receivable Dr $8,100
To bad debt expense $8,100
(Being written off amount is recorded)
On Mar 29
Cash Dr $8,100
To account receivable $8,100
(Being collection is recorded)