Calculator Allowance for Doubtful Accounts has a debit balance of $2,300 at the end of the year (before adjustment). The company prepares an analys of customers' accounts and estimates the amount of uncollectible accounts to be $31,900. Which of the following adjusting entries is needed to record the bad debt expense for the year? a. debit Bad Debt Expense, $34,200; credit Allowance for Doubtful Accounts, $34,200 b. debit Allowance for Doubtful Accounts, $34,200; credit Bad Debt Expense, $34,200 c. debit Bad Debt Expense, $29,600; credit Allowance for Doubtful Accounts, $29,600 d. debit Allowance for Doubtful Accounts, $29,600; credit Bad Debt Expense, $29,600