a)During 2019, a company made credit sales of $ 420,000 and had returns and bonuses on sales of $ 40,000. In addition, the balances of accounts receivable and estimates for doubtful accounts as of December 31, 2019 were $ 160,000 and $ 2,000, respectively. If the company makes provisions for doubtful accounts based on 5% of accounts receivable, then the amount of the adjustment for bad debt expense on December 31 will be:

b) A business has accounts receivable of $ 400,000 and a provision for bad debts of $ 24,500. After a collection attempt, you decide to cancel a customer's account for $ 2,800. Which of the following represents the required entry to cancel the account?

c) A company provided services to a client in exchange for an 8-year document with a face value of $ 400,000 and interest payable annually at a nominal rate of 3%. The company's cost of money is 8% and the customer has a credit rating of 12%. What should be the value of the document receivable that the company must register?