The journal entries are as follows
On December 31
Bad debt expense Dr $3,080 ($616,000 × 0.50%)
To Allowance for doubtful debts $3,080
(Being the estimated bad debt expense is recorded)
On Feb 01
Allowance for doubtful debts Dr $308
To Account receivable $308
(Being the written off amount is recorded)
On June 5
Account receivable $308
To Allowance for doubtful debts Dr $308
(Being the uncollected amount is recorded)
On June 5
Cash Dr $308
To Account receivable $308
(Being the cash received on account is recorded)