Inferring bad debt write-offs and reconstructing related journal entries

The 2012 annual report of Johnson Services reveals the following information. The dollar amounts are end-of-year balances.

2012

2011

Credit sale

$75,300

$61,500

Accounts receivable

9,400

9200

Allowance for doubtful accounts

1300

1000

Bad debt recoveries

55

70

Johnson estimates bad debts each year at 2 percent of credit sales.

a. Compute the actual amount of write-offs during 2012.

b. Infer the journal entries that explain the activity in accounts receivable and the related allowance account during 2012.