At the end of the current year, Accounts Receivables has a balance of $90,000; Allowance for Doubtful Accounts has a credit balance of $850; and sales for the year total $30,000. Bad debt expense is estimated at 2.5% of sales. (a) Journalize the adjusting entry for bad debt expense; (b) determine the adjusted balances of 1) Accounts receivable, 2) Allowance for Doubtful accounts, 3) Bad debt expense, and 4) the net realizable value of accounts receivable.