The records of Eric Company showed the following pre-adjustment information on December 31, 2011:

Net sales (80% on credit)                                                                              $350,000

Accounts receivable                                                                                        $160,000

Allowance for doubtful accounts                                                               $4,100 (debit balance)

Prepare journal entries to record the estimates for bad debt expense assuming:

a) Bad debts are estimated to be 4% of credit sales.

b) Bad debts are estimated to be 3% of net sales.

c) An aging schedule determines that uncollectible accounts should be $13,000.