Marketable Debt Securities Facebook reports the following in its 2018 10-K. The following table summarizes, for assets or liabilities measured at fair value, the respective fair value and the classification by level of input within the fair value hierarchy (in millions): Fair Value Measurement at Reporting Date Using Quoted Prices in Active Significant Other Significant Markets for Identical Asset observable Inputs Nonobservable Inputs Description Dec. 31, 2018 (Level 1) (Level 2) (Level 3) Cash equivalents: Money market funds $6,792 $6,792 $- $- U.S. government securities 90 90 U.S. government agency securities 54 54 Certificate of deposits and time deposits 369 369 Corporate debt securities 1 1 Marketable securities: U.S. government securities 13,836 13,836 U.S. government agency securities 8,333 8,333 Corporate debt securities 8,926 8,926 Total cash equivalents and marketable securities $38,401 $29,105 $9.296 The gross unrealized losses on our marketable securities were $357 million and $289 million as of December 31, 2018 and 2017, respectively. The gross unrealized gains for both periods were not significant. C. What is the cost of its marketable securities? Hint: Consider that its marketable securities are in a loss position. $ 38,401 X