At December 31, 2017, the trial balance of Metlock, Inc. contained the following amounts before adjustment. Debit $171,100 -- Accounts Receivable Allowance for Doubtful Accounts Sales Revenue 1,500 919,500 (a) Prepare the adjusting entry at December 31, 2017, to record bad debt expense, assuming that the aging schedule indicates that $9,310 of accounts receivable will be uncollectible (b) Repeat part (a), assuming that instead of a credit balance there is a $1,500 debit balance in Allowance for Doubtful Accounts. (c) During the next month, January 2018, a $1,940 account receivable is written off as uncollectible. Prepare the journal entry to record the write-off. (d) Repeat part (c), assuming that Metlock, Inc. uses the direct write-off method instead of the allowance method in accounting for uncollectible accounts receivable. (Credit account titles are automatically indented when amount is entered. Do not indent manually.)