Answer:
$3,940
Explanation:
The journal entry to record the adjustment to the allowance account includes-
Debit  Bade debt expense             $3,940 (Note - 1)
Credit  Allowance for doubtful accounts  $3,940
Note - 1
Calculation = $96,000 × 5% = $4,800
However, as the allowance for doubtful accounts has a credit balance of $860 credit, the new bad debt expense will be = ($4,800 - $860) = $3,940 debit.