Answer:
$18,000
Step-by-step explanation:
Under the direct write off method, the amount of bad debt expense is the amount that is written off during the period. The treatment of bad debt expense is that it shows in the debit side of the income statement
In mathematically,
Amount of bad debt expense = written off amount
Amount of bad debt expense = $18,000
All other information which is given is not relevant. Hence, ignored it