Analysis of Receivables Method At the end of the current year, Accounts Receivable has a balance of $640,000; Allowance for Doubtful Accounts has a debit balance of $6,000; and sales for the year total $2,880,000. Using the aging method the balance of Allowance for Doubtful Accounts is estimated as $21,000. a. Determine the amount of the adjusting entry for uncollectible accounts. $fill in the blank 1 b. Determine the adjusted balances of Accounts Receivable, Allowance for Doubtful Accounts, and Bad Debt Expense. Accounts Receivable $fill in the blank 2 Allowance for Doubtful Accounts $fill in the blank 3 Bad Debt Expense $fill in the blank 4 c. Determine the net realizable value of accounts receivable. $fill in the blank 5