Serrao Company had a $700 credit balance in Allowance for Doubtful Accounts at December 31, 2020, before the current year's provision for uncollectible accounts. An aging of the accounts receivable revealed the following: Age of accounts Current Accounts 0-30 days past due 31-60 days past due 61-90 days past due Over 90 days past due Estimated Percentage Uncollectible $140,000 1% 15,000 3% 10,000 6% 12,000 10% 8.000 $185,000 25% Total Accounts Receivable Instructions (a) Prepare the adjusting entry on December 31, 2020, to recognize bad debts expense. (b) Assume the same facts as above except that the Allowance for Doubtful Accounts account had a $500 debit balance before the current year's provision for uncollectible accounts. Prepare the adjusting entry for the current year's provision for uncollectible accounts. (c) Assume that the company has a policy of providing for bad debts at the rate of 1% of sales, that sales for 2020 were $800,000, and that Allowance for Doubtful Accounts had a $1,600 debit balance before adjustment. Prepare the adjusting entry for the current year's provision for bad debts