What is the fair value of the company's total assets as at December 31, 2019?
{"Assets -- Cash equivalents: Money market funds": {"Level 1": 256915, "Level 2": "$ -", "Level 3": "$ -"}, "Other current assets: -- Indemnification - Sale of SSL": {"Level 1": "$ -", "Level 2": "$ -", "Level 3": 598}, "Long term liabilities: -- Indemnification - Globalstar do Brasil S.A.": {"Level 1": "$ -", "Level 2": "$ -", "Level 3": 145}}
total_assets = df["Assets -- Cash equivalents: Money market funds"]["Level 1"] + df["Other current assets: -- Indemnification - Sale of SSL"]["Level 3"]
answer = total_assets