Farr Co. elects to use the percentage-of-sales basis in 2017 to record

bad debt expense. It estimates that 4% of net credit sales will become uncollectible. Sales revenues are $840,000 for 2017, sales returns and allowances are $53,700, and the allowance for doubtful accounts has a credit balance of $9,100.

Prepare the adjusting entry to record bad debt expense in 2017.