During the current year, Giatras Electronics recorded credit sales of $680,000. Based on prior experience, it estimates a 3.5 percent bad debt rate on credit sales.

Required:
Prepare journal entries for each of the following transactions.

a. On October 28 of the current year, an account receivable for $3,000 from a prior year was determined to be uncollectible and was written off.
b. At year-end, the appropriate bad debt expense adjustment was recorded for the current year.