Answer:
At the end of period the allowance for uncollectible debts will be: 15000-3000 = $ 12000 because 3000 account receivable is written off.
Step-by-step explanation:
(Opening) Allowance for uncollectible accounts = 3000 (Dr)
During the year company estimates = $ 15000
Entry : Dr Bad debts expense 15000
Cr Allowance for bad debts 15000
( To record uncollectible accounts)