Answer:
$26,600
Explanation:
Bad debts expense based on a percentage of credit sales requires an adjusting entry equal to the percentage of credit sales; no consideration is given to the ending balance of the allowance account when computing the adjustment.
The adjusting entry will include a credit to the Allowance for Doubtful Accounts account for $26,000 (or $650,000 x .04).
Note, however, that this question asks for the ending balance in the allowance account.
Since there is a $600 credit balance prior to adjustment, the balance in the allowance account after adjustment will be $26,600
(the credit balance of $600 + a credit of $26,000 will yield an ending credit balance of $26,600).