Would like help with this problem.

Question 12 (3 points) A trial balance before adjustments included the following: Debit Sales Accounts receivable 172,000 Allowance for doubtful accounts Credit $300,000 4,000 If the estimate of uncollectible accounts is made by taking 5% of gross accounts receivables, what is the amount of bad debt expense (i.e., the amount of period-end adjustment)?(3 points)