1. What is the total (gross) value of Coca-Cola's accounts receivable (before deduction for its allowance for doubtful accounts) as of December 31, 2013? As of December 31, 2012? 2. What is "net realizable value"? 3. What factors does Coca-Cola use to determine the amount of its allowance for doubtful accounts? 4. In what line item on the income statement would bad debt expense be included