Assume that Werner Orthodontist Practice estimates its annual bad debt expense using the aging of accounts receivables method: a. Calculate the allowance for uncollectible accounts for year ending December 31, 2019. b. Record the December 31, 2019, adjusting entry assuming the following beginning balance in the Allowance for Uncollectible Accounts. Show how Accounts Receivables would be presented on the Balance Sheet of Werner Orthodontist Practice under each scenario. i. $0 balance in the Allowance for Uncollectible Accounts (or Allowance for Doubtful Debt accounts). ii. $5,000 credit balance in the Allowance for Uncollectible Accounts (or Allowance for Doubtful Debt accounts). Also compute the accounts receivables turnover ratio and the average collection period under this scenario. iii. $1,000 debit balance in the Allowance for Uncollectible Accounts (or Allowance for Doubtful Debt accounts). 3 Assume that Werner Orthodontist Practice estimates its annual bad debt expense using the aging of accounts receivables method and the balance of Allowance for Uncollectible Accounts before adjustment is $5,000 (credit). a. On July 19, 2020, a customer's account balance of $8,000 is written off as uncollectible. Record the write-off. b. On September 30, 2020, the customer whose account was written off in Requirement 3a unexpectedly pays the full amount. Record the cash collection.