Step-by-step explanation:
a. The Journal Entry is shown below:-
Bad Debt expense Dr, $17,500
To Allowance for doubtful allowance $17,500
(Being bad expense is recorded)
Working note
Bad debt expense = (Accounts receivable × Percentage of uncollectible) + Allowance for doubtful accounts
= $630,000 × 2% + $4,900
= $12,600 + $4,900
= $17,500
b. The ending (adjusted) balance in Allowance for doubtful accounts = Accounts receivable × Percentage of uncollectible
= $630,000 × 2%
= $12,600