Super Duper Companys balance sheet at December 31, 2016, reported the following: Accounts receivable............................................................... $420,000 Less: Allowance for uncollectible accounts............................$8,400 Requirements: 1. What was the net realizable value of these receivables at December 31, 2016? 2. Journalize, without explanations, 2017 entries for Super Duper: a. Total credit sales for 2017 were $840,000; 4% of sales were estimated to be uncollectible. Super Duper received cash payments on account during 2017 of $520,000. b. Accounts receivable identified to be uncollectible totaled $26,000. c. December 31, 2017, aging of receivables indicates that $20,000 of the receivables is uncollectible (target balance). 3. Post the transactions to the Accounts receivable and the Allowance for uncollectible accounts T-accounts. Calculate and report Super Dupers receivables and related allowance on the December 31, 2017 balance sheet. 4. What is the net realizable value of receivables at December 31, 2017? 5. How much is the uncollectible account expense for 2017?